ONT - LON

£290 Find Cheap Flights from Ontario 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 Ontario to London departing on 6/10. 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

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 Ontario 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 Ontario to London, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 26% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheap Flight Deals from Ontario to London (ONT-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ontario 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.

Recent return flight deals from Ontario to London

KAYAK's recommended return flight deals from the most popular airlines that fly from Ontario to London.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Lufthansa Logo
13:15 - 09:40ONT-LHR
12h 25m1 stop
Lufthansa Logo
14:50 - 20:33LHR-ONT
13h 43m1 stop
£503Lufthansa
Find Deal
Tue, 23 Sep - Fri, 24 Oct
United Airlines Logo
05:10 - 12:20ONT-LHR
23h 10m1 stop
United Airlines Logo
14:05 - 17:17LHR-ONT
35h 12m2 stops
£521United Airlines
Find Deal
Mon, 22 Sep - Fri, 10 Oct
Air Canada Logo
05:10 - 06:35ONT-LHR
17h 25m2 stops
Air Canada Logo
14:10 - 12:13LHR-ONT
30h 03m2 stops
£527Air Canada
Find Deal
Mon, 22 Sep - Fri, 10 Oct
British Airways Logo
17:09 - 14:40ONT-LHR
13h 31m1 stop
British Airways Logo
15:40 - 21:40LHR-ONT
14h 00m1 stop
£530British Airways
Find Deal
Tue, 23 Sep - Tue, 21 Oct
Air Canada Logo
05:10 - 06:35ONT-LHR
17h 25m2 stops
Air Canada Logo
14:10 - 17:37LHR-ONT
35h 27m2 stops
£564Air Canada
Find Deal
Wed, 10 Sep - Sat, 20 Sep
British Airways Logo
14:59 - 12:30ONT-LHR
13h 31m1 stop
British Airways Logo
11:15 - 17:51LHR-ONT
14h 36m1 stop
£576British Airways
Find Deal
Tue, 12 Aug - Sat, 6 Sep
JetBlue Logo
23:00 - 20:45ONT-LHR
13h 45m1 stop
JetBlue Logo
08:15 - 21:41LHR-ONT
21h 26m1 stop
£585JetBlue
Find Deal
Wed, 1 Oct - Fri, 10 Oct
JetBlue Logo
23:00 - 20:45ONT-LHR
13h 45m1 stop
JetBlue Logo
11:55 - 21:41LHR-ONT
17h 46m1 stop
£585JetBlue
Find Deal
Wed, 1 Oct - Tue, 7 Oct
Iberia Logo
12:49 - 10:50ONT-LHR
14h 01m1 stop
Iberia Logo
09:15 - 23:36LHR-ONT
22h 21m2 stops
£595Iberia
Find Deal
Tue, 16 Sep - Wed, 24 Sep
Iberia Logo
10:51 - 14:25ONT-LHR
19h 34m1 stop
Iberia Logo
11:30 - 23:43LHR-ONT
20h 13m2 stops
£636Iberia
Find Deal
Fri, 9 May - Tue, 13 May

KAYAK's insights & trends for Ontario to London flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario 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 Ontario to London is October, where tickets cost £502 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is £832 and £663 respectively.

How far in advance should I book a flight from Ontario 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 Ontario 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 Ontario to London, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know - Cheap tickets from Ontario to London

Low season

January

High season

June

Cheapest flight

£290
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (43% more expensive on average)
Flight from Ontario to London Heathrow Airport

When to book flights from Ontario to London

Are your dates flexible? Find out the best times to travel from Ontario 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.

FAQs for booking flights from Ontario to London

  • How can I get to the city center by public transport after my flight from Ontario to London?

    Upon arrival at London Heathrow Airport from Ontario, you can easily reach the city center using public transportation. Take the Heathrow Express train to Paddington Station, which operates every 15 minutes. From Paddington, you can transfer to the London Underground and take the Bakerloo Line or Circle Line to reach the city center.

  • Can I pre-book my seat on WestJet flights from Ontario to London?

    Yes, you can pre-book your seat on WestJet flights from Ontario to London. WestJet offers the option to select your preferred seat in advance, allowing you to secure your desired seating arrangement for a more comfortable journey. By accessing their online booking portal or contacting their customer service, you can make seat reservations according to your preferences and availability.

  • Which kid-friendly amenities does WestJet have on flights from Ontario to London?

    WestJet offers several kid-friendly amenities on flights from Ontario to London. These amenities include children's entertainment options such as movies, TV shows, and games suitable for different age groups. They also provide complimentary activity packs with coloring books, crayons, and puzzles to keep young travelers engaged during the flight.

  • What are the baggage restrictions when flying Virgin Atlantic from Ontario to London?

    The baggage restrictions when flying Virgin Atlantic from Ontario to London include a checked baggage allowance of two pieces weighing up to 50 lbs each in Economy class. Additionally, passengers are allowed one carry-on bag weighing up to 22 lbs and one personal item such as a laptop or handbag.

  • What is the cheapest flight from Ontario to London?

    In the last 3 days, the lowest price for a flight from Ontario to London was £386 for a one-way ticket and £670 for a return.

  • Which airports will I be using when flying from Ontario to London?

    When flying out of Ontario you will be using Ontario. You will be landing at one of these airports: London Gatwick or London Heathrow.

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

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to London?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Ontario and London, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Ontario 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 Ontario to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Ontario 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 Ontario 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 Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario 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 Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

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

  • Common layover options for Air Canada flights from Ontario (ONT) to London (LON) may include stopovers in major hub cities such as Toronto, Montreal, or Ottawa. These layovers often provide convenient connections for passengers, allowing them to change planes and continue their journey to London.
  • Additionally, Air Canada offers a special food service called "Chef's Menu" on its flights from Ontario to London. Passengers can enjoy a delectable selection of culinary delights prepared by renowned chefs. The menu features a range of gourmet dishes using fresh, locally sourced ingredients, ensuring a delightful dining experience in the skies. From appetizers to main courses and desserts, Air Canada's Chef's Menu promises to satisfy the taste buds of travelers throughout their journey.
  • Air Canada offers a variety of in-flight entertainment options on its flights from Ontario to London. Passengers can enjoy a selection of movies, TV shows, and music, with a wide range of genres to choose from. Additionally, the airline provides personal screens with touch controls, offering a seamless and enjoyable viewing experience.
  • WestJet assists passengers with disabilities traveling from Ontario to London. They offer wheelchair assistance, accessible seating options, and priority boarding. Passengers can request special services such as mobility aids or medical equipment during their journey. WestJet's trained staff is available to ensure a comfortable and safe travel experience for passengers with disabilities, addressing their specific needs and providing necessary support throughout the journey.
  • You can change your seat when flying with WestJet from Ontario to London. Seat changes are subject to availability, and you can make the change either during the booking process or by accessing your reservation online. Alternatively, you can contact WestJet's customer service for assistance with seat changes.
See more tips

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.