PHL - LON

£226 Find Cheap Flights from Philadelphia to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to London departing on 21/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to London, as well as popular online travel agencies
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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£544
Typical prices: £598-£449
Scandinavian Airlines
Tue 25/8Wed 2/9
PHL - LHR • 2 stops
Cheapest direct flights
£626
Typical prices: £780-£562
Iberia
Mon 27/4Wed 6/5
PHL - LHR • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
Finnair's A350 offers a comfortable cabin environment.
Expect possible delays with British Airways flights.
Expert advice
Expert advice
+1
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Expert advice
Expert advice
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Top airlines
Cheapest • from £544 (return)
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Direct flights
Every day
You can fly direct with American Airlines and British Airways. Average duration is 7h 13m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Top routes
Cheapest
Most popular
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £552 (return)
Shortest trip • 9h 48m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 45% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 17% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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Flight Deals
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Flight Deals

Cheap Flights from Philadelphia to London (PHL-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Philadelphia to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Philadelphia to London

Tue, 25 Aug - Wed, 2 Sep
Scandinavian Airlines Logo
09:40 - 09:20
PHL
-
LHR
18h 40m
2 stops
Scandinavian Airlines Logo
06:40 - 19:58
LHR
-
PHL
18h 18m
2 stops
£544Scandinavian Airlines
Mon, 13 Apr - Wed, 29 Apr
Multiple Airlines Logo
18:30 - 20:25
PHL
-
LGW
20h 55m
2 stops
Multiple Airlines Logo
14:00 - 07:41
LGW
-
PHL
22h 41m
1 stop
£548Multiple Airlines
Fri, 24 Apr - Fri, 1 May
Multiple Airlines Logo
22:38 - 10:00
PHL
-
LGW
30h 22m
1 stop
Multiple Airlines Logo
14:00 - 07:41
LGW
-
PHL
22h 41m
1 stop
£549Multiple Airlines
Sun, 19 Apr - Sat, 25 Apr
Multiple Airlines Logo
22:38 - 10:00
PHL
-
LGW
30h 22m
1 stop
Multiple Airlines Logo
14:00 - 07:41
LGW
-
PHL
22h 41m
1 stop
£555Multiple Airlines
Mon, 21 Sep - Tue, 13 Oct
Aer Lingus Logo
20:25 - 12:40
PHL
-
LHR
11h 15m
1 stop
Aer Lingus Logo
12:00 - 18:55
LHR
-
PHL
11h 55m
1 stop
£571Aer Lingus
Wed, 29 Apr - Wed, 6 May
JetBlue Logo
08:25 - 06:30
PHL
-
LHR
17h 05m
1 stop
JetBlue Logo
08:40 - 17:38
LHR
-
PHL
13h 58m
1 stop
£576JetBlue
Tue, 25 Aug - Wed, 2 Sep
JetBlue Logo
08:28 - 06:30
PHL
-
LHR
17h 02m
1 stop
JetBlue Logo
08:40 - 19:49
LHR
-
PHL
16h 09m
1 stop
£581JetBlue
Mon, 27 Apr - Wed, 6 May
Iberia Logo
20:15 - 15:15
PHL
-
LCY
14h 00m
1 stop
Iberia Logo
09:35 - 17:40
LCY
-
PHL
13h 05m
1 stop
£583Iberia
Tue, 12 May - Tue, 19 May
Iberia Logo
19:45 - 15:15
PHL
-
LCY
14h 30m
1 stop
Iberia Logo
09:35 - 17:40
LCY
-
PHL
13h 05m
1 stop
£721Iberia
Mon, 27 Apr - Mon, 4 May
KLM Logo
18:29 - 16:40
PHL
-
LCY
17h 11m
2 stops
KLM Logo
20:15 - 16:11
LCY
-
PHL
24h 56m
2 stops
£730KLM
Booking Insights

KAYAK’s insights & trends for Philadelphia to London flights

Get data-powered insights and trends into flights from Philadelphia to London to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Philadelphia to London?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to London departing in August.

What is the cheapest Philadelphia to London flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Philadelphia to London costs £566 on the route between Philadelphia (PHL) and London Heathrow Airport (LHR). It is also the most popular route.

What’s the cheapest day of the week to fly from Philadelphia to London?

The average price of all round-trip flights from Philadelphia to London clicked on KAYAK for each day over the last 12 months.

For Philadelphia to London, Tuesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London back to Philadelphia, the best deals are generally found on Wednesday, with Sunday being the most expensive.

What is the cheapest month to fly from Philadelphia to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to London is September, where tickets cost £487 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £848 and £664 respectively.

Can I save money by flying with a stopover from Philadelphia to London?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £620 on average.

How far in advance should I book a flight from Philadelphia to London?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to London, you should book around 3 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Expert advice

Expert advice for your flight from Philadelphia to London

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Good to know - Cheap tickets from Philadelphia to London

Low seasonFebruary
Cheapest flight£226
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly and prices are also 13% lower on average.
Flight from Philadelphia to London Stansted Airport

When to book flights from Philadelphia to London

Are your dates flexible? Find out the best times to travel from Philadelphia to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Philadelphia to London: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Philadelphia to London 
LisaFlew with British Airways
PHL
-
LHR
May 2025
Make sure you have enough time in London if you have a transfer flight. I would recommend at least 2 hours.
RadicalFlew with American Airlines
PHL
-
LHR
May 2025
Don’t put everything in your gate check bags. Make sure you have clothes in your carry on
Verified travelerFlew with British Airways
PHL
-
LHR
Oct 2024
Eat well before boarding if you’re a picky eater.
GlennFlew with British Airways
PHL
-
LHR
Jun 2024
British airways could have many delays, ensure there's enough time for the layover

FAQs for booking flights from Philadelphia to London

  • Is it possible to fly from Philadelphia International Airport (PHL) to London non-stop?

    You can find non-stop flights from PHL to London Heathrow Airport (LHR). Multiple airlines offer flights with one and two stops, including American Airlines, British Airways, United Airlines, and Delta Air Lines, with common layovers in New Jersey, Miami, and Washington DC.

  • Are there currency exchange offices at London Heathrow Airport (LHR)?

    Yes, there are a few currency exchange desks at LHR terminals, making it not only safer but convenient as you move around with money. At London Heathrow, you have the choice of ordering the currency online then collecting it as you pass through the airport, or getting currency conversion on the spot. You will find that the conversion prices are different for these two options.

  • Does London Heathrow Airport (LHR) offer any facilities for families?

    Heathrow Airport has several amenities suitable for groups of people traveling with children, including complimentary kid’s meals, baby changing areas, family-friendly parking, as well as a free Mr. Adventure Stay and Play areas filled with slides, coloring stations, and activity sheets.

  • Are there any services for travelers with limited mobility at London Airports?

    Disability assistance services should be arranged for before your day of travel. You will find that the airport bathrooms are readily equipped to cater to passengers with wheelchairs, with most having private bathrooms for people with reduced mobility.

  • What is the cheapest flight from Philadelphia to London?

    In the last 3 days, the lowest price for a flight from Philadelphia to London was £226 for a one-way ticket and £544 for a return.

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to London?

    All the following airlines offer inflight Wi-Fi service on the Philadelphia to London flight route: British Airways, Iberia, Finnair, American Airlines, Aer Lingus, Air France, KLM, Delta, SWISS, and Malaysia Airlines.

  • Which aircraft models fly most regularly from Philadelphia to London?

    The Airbus A350-1000 is the aircraft model that flies most regularly on the Philadelphia to London flight route.

  • Which airline alliances offer flights from Philadelphia to London?

    oneworld is the only airline alliance operating flights between Philadelphia and London.

  • On which days can I fly direct from Philadelphia to London?

    There are direct flights from Philadelphia to London on a daily basis.

  • Which is the best airline for flights from Philadelphia to London, JetBlue or American Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to London are JetBlue and American Airlines. With an average price for the route of £505 and an overall rating of 7.2, JetBlue is the most popular choice. American Airlines is also a great choice for the route, with an average price of £664 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Philadelphia to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Philadelphia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Philadelphia to London

  • Looking for a cheap flight from Philadelphia to London? 25% of our users found flights on this route for £356 or less one-way and £649 or less round-trip.
  • Philadelphia International Airport (PHL) is the main airport in the city of Philadelphia and is located approximately 11.3 miles from the city center. Since the airport is centrally located, it can be accessed by a majority of residents in Philadelphia, as well as neighboring cities such as Ardmore, Doylestown, Amber, and Lambertville in New Jersey.
  • There are six major airports in London: London Gatwick (LGW), London Luton (LTN), London City (LCY), London Heathrow (LHR), London Southend (SEN), and London Stansted (STN). If you will be staying in the city, you can opt for flights that land at London Heathrow or London City as they are conveniently located on the London Underground and DLR systems.
  • If you are traveling to London for business, you’ll find that the London City Airport is a good airport for your trip as it is conveniently situated in central London and is easily accessible to the city.
  • The distance between London City Airport and Central London is roughly 6.2 miles. If you want to get to the city center via public transportation, you can take the DLR train for roughly 22min. A taxi or car will get you there in around 30min. If you are coming from London Heathrow, you can use trains exiting from Terminals 2 and 3, which leave every 15min and can get you to central London in around 15min.
  • As you wait for your flight, there are several amenities you could take advantage of at the Philadelphia International Airport. For one, head on over to one of the 50 eateries on-site and grab a quick bite. The airport also has a virtual library available and open to passengers. Alternatively, the XpresSpa has several locations offering manicures, pedicures, massages, and facials if you would like to pamper yourself a little.

Prefer to fly direct from Philadelphia to London?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Philadelphia to London.
Find which airlines fly direct from Philadelphia Airport to London, which days they fly and book direct flights.

Direct departures

Philadelphia to London

Monday

American Airlines,British Airways

American Airlines,British Airways

Tuesday

American Airlines,British Airways

American Airlines,British Airways

Wednesday

American Airlines,British Airways

American Airlines,British Airways

Thursday

American Airlines,British Airways

American Airlines,British Airways

Friday

American Airlines,British Airways

American Airlines,British Airways

Saturday

American Airlines,British Airways

American Airlines,British Airways

Sunday

American Airlines,British Airways

American Airlines,British Airways

See more direct flights

Direct returns

London to Philadelphia

Monday

American Airlines,British Airways

American Airlines,British Airways

Tuesday

American Airlines,British Airways

American Airlines,British Airways

Wednesday

American Airlines,British Airways

American Airlines,British Airways

Thursday

American Airlines,British Airways

American Airlines,British Airways

Friday

American Airlines,British Airways

American Airlines,British Airways

Saturday

American Airlines,British Airways

American Airlines,British Airways

Sunday

American Airlines,British Airways

American Airlines,British Airways

See more direct flights

Reviews of the top 4 airlines flying from Philadelphia to London

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
JetBlueOverall score based on 2908 reviews
7.4Boarding
6.6Food
8.0Crew
7.2Entertainment
7.5Comfort
Airline reviews

I was especially impressed without efficiently the crew got passengers on and off. One of the stewards was slightly gruff, I thought. No big deal but that's what I noticed.

10.0 ExcellentDavid, Mar 2026
PBI - LGA
Read more JetBlue reviews

I was especially impressed without efficiently the crew got passengers on and off. One of the stewards was slightly gruff, I thought. No big deal but that's what I noticed.

Absolutely horrible. Flight was delayed 4 hours and they had no clue what was going on.

Onboard functioning wide-variety entertainment on a budget and having an open pantry is nice. Seats are not comfortable but go provide plenty of legroom for a 6'2" 260lbs man.

Even though the weather made a lot of flights become cancelled Jet Blue made the flight that was supposed to leave at 9 pm and we left at 12:15 am and I was so grateful- Thanks to the Senior Jet Blue Staff who made those decisions

Worst customer service ever experienced on the planet, dirty plane, no communication, and severe delays

Flight cancelled 2 hours prior to boarding. No explanation. No refunds.

Delayed by 1.5 hours. Terrible apologies, half hearted at best. It will be a LONG time until i book w Jet Blue again. Very disappointed.

My check in was stressful. I somehow lost my seat from my original booking, the plane showed no availability/no seat when it was time to check-in. I called and was instructed to try to get a seat at the airport. I asked if it was a full flight and the travel agent said the site showed some seating but was not able to secure one for me. Why not? On my way to the airport the app finally revealed one available seat towards the back of the aircraft that I was able to book. It ended up being an overbooked flight, so glad I wasn't stuck.

Flights with JetBlue from San Diego to Boston are a miserable experience. The flight was delayed about 1.5 hours due to “weather” supposedly but the flights for other airlines left on time so it just have been some kind of weather that only affects JetBlue. I had a small carry on - purse. The crew stored it in a bin 2 rows down from me because they were using the bin next to my seat for other people’s stuff. The TV screen in the emergency row seats does not work. It just was awful from start to finish. When we landed, we had to sit inside the plane for a very long time because the plane had to be moved to a different gate.

They made me check my bag and I didn't need to as there was overhead space available. I paid for a seat towards the front of the plane and it didn't recline. I requested a refund and they declined to give me one.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

Broke my luggage and I can't get a resolution yet.

My flight to London from Philadelphia was cancelled due to weather.

Flight was fine - however my husband's checked in case was damaged, and mine still has not arrived

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

The boarding procedure got confusing because they wanted to weigh everyone’s carry-on. Apparently mine was 3 1/2 kg over their limit. I didn’t know they had a limit. And at the check-in desk, nothing was said about this. They wanted me to check the carry-on at no charge and that would have been fine except then they told me at my connection in London I would have to go outside to baggage claim retrieve my bag, and then recheck it. In other words, they could not check it to my final destination, only to London. I told him this was unacceptable so after a few minutes of discussion, they came back and said that my bag would be OK to carry on the plane. It seems that if you have a connection then the weight is not as important. Then when I actually went to board the boarding agent said I needed a tag indicating that my bag had been weighed, even though she had just five minutes ago talked to the same person who cleared me. Lots of confusion seems like a very bad process. They need to improve this.

My flight being automatically moved messed up my travel plans, and I had to quickly find an alternative mode of transportation. I couldn’t get a refund from any of the companies involved. Kayak, Ibiza, or Vueling. I am still unsure of how to settle my concern.

Plane delayed due to weather. Plane boarded, then told to unboard due to a maintenance issue.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The gate agent made me check my carry-on in Denver, even though I've traveled all over taking this case on the plane. Beware folks. Food in Premium Economy was quite good - excellent blanket! Flight attendants on the Heathrow-to-Budapest flight on 3-27-2026 were quite snappy. I got a frown when asked to unscrew the water bottle cap for me (I had a cast on my right arm). Also woke up right when they were handing out biscuits. She had given my rowmates one and was in the process of giving water when I asked for a biscuit. She scolded me and said, "You snooze, you lose". She did give me one, but I thought that comment was uncalled for.

Wish the food and overall service was better. They treat Business class passengers same as economy

WiFi wasn’t available to economy until the end of the flight.

Very good staff members with sincere passion and responsibility in their job.

Very please with the seating that the Kayak staff booked for us!

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

Everything you need to know for your flight from Philadelphia to London

Information on your arrival and departure airports