CNX - LHR

£246 Find Cheap Flights from Chiang Mai to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chiang Mai to Heathrow departing on 8/5. 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 Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chiang Mai 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 Chiang Mai to London, as well as popular online travel agencies
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Cheap Flight Deals from Chiang Mai to Heathrow (CNX-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Chiang Mai to Heathrow 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 Chiang Mai to Heathrow

KAYAK's recommended return flight deals from the most popular airlines that fly from Chiang Mai to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
China Eastern Logo
14:55 - 18:40CNX-LHR
33h 45m1 stop
China Eastern Logo
21:20 - 13:25LHR-CNX
34h 05m1 stop
£652China Eastern
Find Deal
Sun, 15 Jun - Thu, 19 Jun
China Eastern Logo
14:55 - 18:40CNX-LHR
33h 45m1 stop
China Eastern Logo
21:20 - 13:25LHR-CNX
34h 05m1 stop
£654China Eastern
Find Deal
Thu, 22 May - Thu, 29 May
 Logo
22:20 - 19:50CNX-LHR
27h 30m2 stops
 Logo
13:15 - 17:55LHR-CNX
22h 40m2 stops
Sun, 15 Jun - Thu, 19 Jun
China Southern Logo
11:30 - 19:00CNX-LHR
37h 30m1 stop
China Southern Logo
22:10 - 10:25LHR-CNX
30h 15m1 stop
£696China Southern
Find Deal
Sun, 15 Jun - Thu, 19 Jun
Singapore Airlines Logo
17:40 - 19:30CNX-LHR
31h 50m1 stop
Singapore Airlines Logo
22:05 - 16:40LHR-CNX
36h 35m1 stop
£813Singapore Airlines
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Thu, 4 Sep - Tue, 16 Sep
EVA Air Logo
20:00 - 19:20CNX-LHR
29h 20m1 stop
EVA Air Logo
21:35 - 19:10LHR-CNX
15h 35m1 stop
£819EVA Air
Find Deal
Thu, 4 Sep - Wed, 17 Sep
Singapore Airlines Logo
17:40 - 15:45CNX-LHR
28h 05m1 stop
Singapore Airlines Logo
09:25 - 16:40LHR-CNX
25h 15m1 stop
£820Singapore Airlines
Find Deal
Thu, 4 Sep - Wed, 17 Sep
 Logo
21:10 - 08:20CNX-LHR
17h 10m2 stops
 Logo
08:40 - 13:45LHR-CNX
23h 05m2 stops
Thu, 4 Sep - Wed, 17 Sep
EVA Air Logo
20:00 - 19:20CNX-LHR
29h 20m1 stop
EVA Air Logo
21:35 - 19:10LHR-CNX
15h 35m1 stop
£913EVA Air
Find Deal
Sat, 28 Jun - Thu, 10 Jul
China Southern Logo
18:50 - 19:00CNX-LHR
30h 10m1 stop
China Southern Logo
06:30 - 10:25LHR-CNX
21h 55m2 stops
£931China Southern
Find Deal
Sun, 29 Jun - Thu, 10 Jul

KAYAK's insights & trends for Chiang Mai to Heathrow flights

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

What’s the cheapest day of the week to fly from Chiang Mai to London Heathrow Airport?

The average price of all round-trip flights from Chiang Mai to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Chiang Mai to London Heathrow Airport, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from London Heathrow Airport, Sunday is the cheapest day to fly and Tuesday is the most expensive.

Good to know - Cheap tickets from Chiang Mai to London Heathrow Airport

Low season

December

High season

October

Cheapest flight

£246
Best time to beat the crowds (43% less expensive on average)
Most popular time to fly and prices are also 35% lower on average.
Flight from Chiang Mai to London Heathrow Airport

When to book flights from Chiang Mai to Heathrow

Are your dates flexible? Find out the best times to travel from Chiang Mai to Heathrow 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 Chiang Mai to London Heathrow Airport flights

  • Where do flights with one stopover between Chiang Mai to Heathrow usually stop?

    Thai Airways flights usually stop in Bangkok. Korean Air flights generally stop in Seoul at Incheon Airport (ICN) and EVA Air flights also stop in Bangkok. You can also find flights with Singapore Airlines that stop at Singapore Changi Aiport (SIN). Some China Eastern flights have a single stopover in Shanghai (PVG) while most Cathay Pacific flights have two stops, although some include a single stopover in Hong Kong (HKG).

  • How much checked luggage can I bring on flights to Chiang Mai?

    Korean Air allows you to bring 23 kg on an Economy ticket. Qatar Airways allows 20 kg, 25 kg, 30 kg or 35 kg, depending on the type of Economy fare you choose. Thai Airways lets you bring 20 kg of checked luggage on their Standard Economy fare. Singapore Airlines lets you bring 25 kg on their Value and Lite fares and 30 kg on their Flexi and Standard fares.

  • How much carry-on luggage can I bring on flights to London?

    Korean Air allows you to bring 10 kg of carry on luggage spread across your suitcase and personal bag. Most other airlines let passengers bring up to 7 kg of carry on luggage, plus a small personal item. This item usually isn't weighed, but it generally can't be larger than 40 x 30 x 10 cm.

  • Which lounges can I use at Chiang Mai Airport (CNX)?

    Chiang Mai Airport has a number of lounges available. Bangkok Airways has two lounges in the Domestic Terminal. Thai Airways has lounges in the domestic and international terminals. You can also spend time at the Coral Executive Lounge. There's one in each terminal and they're open to all passengers for an additional fee.

  • What is the cheapest flight from Chiang Mai to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Chiang Mai to London Heathrow Airport was £327 for a one-way ticket and £866 for a return.

  • Which airports will I be using when flying from Chiang Mai to London Heathrow Airport?

    When flying out of Chiang Mai you will be using Chiang Mai. You will be landing at London Heathrow Airport, also known as London Heathrow.

  • Which aircraft models fly most regularly from Chiang Mai to London Heathrow Airport?

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

  • Which airline alliances offer flights from Chiang Mai to London Heathrow Airport?

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

  • How does KAYAK find such low prices on flights from Chiang Mai to London Heathrow Airport?

    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 Chiang Mai to London Heathrow Airport.

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

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

  • What is the Hacker Fare option on flights from Chiang Mai to London Heathrow Airport?

    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 Heathrow Airport with an airline and back to Chiang Mai with another airline.

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

    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 Heathrow Airport from Chiang Mai 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 Chiang Mai to London Heathrow Airport

  • If you need special assistance on this route, make sure to contact your airline at least 48 hours in advance. As there are some self-transfer routes with multiple airlines, check to see if you need to contact both airlines.
  • While there are many flights from Chiang Mai to London Heathrow Airport (LHR) with a single stopover, you can also find flights with two stopovers that are cheaper. Most stop in Bangkok (BKK) first. Oman Air flights then stop in Muscat and Etihad Airways flights stop in Abu Dhabi (AUH). Bangkok Airways and Austrian Airlines partner for a route that stops in Bangkok and Vienna (VIE)
  • After landing at London Heathrow Airport, you can head into Central London on the Heathrow Express. It takes around 15 minutes to arrive at London Paddington Station. Alternatively, you can take the Elizabeth Line train which takes slightly longer but is also cheaper.
  • If you fly with Emirates or Qatar Airways, you can use their stopover services on your second stopover in Dubai (DXB) or Doha (DOH). This service includes a stay at a luxury hotel and optional tours. If you have to book a long stopover with Emirates, you may be able to access this service for free.
  • If you have a stopover in Bangkok, make sure you check your ticket carefully. Some of these flights may depart from the Domestic Terminal in Chiang Mai, instead of the international one. This may also mean you'll need to go through a security check when you enter the International Terminal in Bangkok.
See more tips

Top airline flying from Chiang Mai to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Chiang Mai 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 Chiang Mai to Heathrow? 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.
7.7
Thai AirwaysOverall score based on 325 reviews
7.8Boarding
7.3Food
8.3Crew
7.5Comfort
6.8Entertainment
Airline reviews

They used Thai Smile plane, which is a smaller model and used to service only domestic flights; hence, the plane is small and quite compact. No entertainment on the flight. While boarding was delayed, it was done in a quick manner.

6.0 GoodAnonymous, Apr 2025BKK - DPS
Read more Thai Airways reviews

They used Thai Smile plane, which is a smaller model and used to service only domestic flights; hence, the plane is small and quite compact. No entertainment on the flight. While boarding was delayed, it was done in a quick manner.

I give EVA 5 stars in every category. I enjoy this airline and it's great team of employees. I always highly recommend EVA to friends and family and everyone.

The flight was delayed going out of the gate at BKK that made it a difficult challenge to get through immigration transfer at tapei and make it to my departure on time. This appears to be a recurring issue. The flight crew and cabin crew were excellent. The food was very nice.

The boarding efficiency was good. A couple of the flight attendants did not seem in the best of moods. Overall it was a good experience.

The setting configuration of the aircraft stinks. Nobody should pay business class fares and be so uncomfortable. The design of facing fellow passengers is a brilliant nincompoop.

Entertainment is limited with a relatively old catalogue. Wi-Fi never works and the cabin and lavatory had evidence of a lot of scuff marks and temporary repairs. Nothing unsafe, but a bit tatty in places.

Delayed flight in Singapore caused the transfer at Bangkok to be very stressful. Fortunately, no elderly were in this trip, else it will not be possible to catch the connecting flight. There were also several occasions throughout the flight journey where some of the passengers were not wearing their seat belts despite several remainders from the stewardess.

USB charging port was not working at my seat 48K.

I enjoy flying with Thai Airways, however their B788 business class configuration is quite dated. Additionally , while the service is always friendly and efficient, I’m getting tired of the same “usual suspects” when it comes to food choices. Since it was a lunchtime flight, what about some gourmet sandwiches or some type of salad dish for the main course? The entertainment options are also quite limited and this is not unique to TG, so much so that given the short duration of the flight I ended up not bothering with any entertainment. Finally, despite signs around the cabin advising wifi available, I was unable to con-net and in fact I’ve never been able to connect on any TG flight over the last year or so - what’s the go here??

Always liked Thai Airways but in the past they have been very expensive, not being a millionaire just yet, I will use cheaper airlines. Bangkok to London £370 11 hours 45 mins. Old plane but ok. Lovely ladies on board, very polite. Food was ok. Will always use them if the price is right.

Everything you need to know for your flight from Chiang Mai to Heathrow

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