Cheap flights from London Heathrow Airport to Chiang Mai from £336
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CNX
14 Dec — 21 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Chiang Mai are usually found in May or June, booked 44 days in advance, depart on a Sunday or Monday and return on a Monday
Cheap flight deals from Heathrow to Chiang Mai
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 November 2025.
Explore the most affordable flight options available from Heathrow to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 November 2025.
Fri 21/1117:40LHR - CNX
1 stop21h 10mAir China
Sun 30/1123:05CNX - LHR
1 stop25h 45mAir China
Deal found 13/11£508
Sun 30/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 13/11£509
Sun 23/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 12/11£511
Wed 19/1121:00LHR - CNX
1 stop34h 20mChina Eastern
Wed 3/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 13/11£515
Thu 20/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/110:05CNX - LHR
2 stops38h 25mChina Eastern
Deal found 12/11£517
Thu 20/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Tue 20/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 12/11£518
Tue 2/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Fri 12/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 12/11£521
Sat 22/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Sat 6/1215:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 13/11£522
Thu 27/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 11/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 13/11£523
Best flights from Heathrow to Chiang Mai
Discover carefully curated flight deals from Heathrow to Chiang Mai that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 November 2025.
Sun 11/120:25LHR - CNX
1 stop18h 25mAir China
Wed 11/223:05CNX - LHR
1 stop23h 50mAir China
Deal found 12/11£519
Tue 3/321:00LHR - CNX
1 stop34h 20mChina Eastern
Sat 7/316:25CNX - LHR
2 stops56h 05mChina Eastern
Deal found 11/11£544
Tue 17/219:25LHR - CNX
2 stops18h 35mAustrian Airlines
Tue 10/309:25CNX - LHR
2 stops19h 15mAustrian Airlines
Deal found 13/11£574
Tue 12/517:50LHR - CNX
2 stops19h 20mMultiple Airlines
Wed 27/520:00CNX - LHR
2 stops28h 40mMultiple Airlines
Deal found 12/11£587
Fri 20/219:20LHR - CNX
2 stops31h 05mEtihad Airways
Sat 28/208:50CNX - LHR
1 stop16h 20mEtihad Airways
Deal found 12/11£619
Fri 9/117:40LHR - CNX
1 stop21h 10mAir China
Mon 19/123:05CNX - LHR
1 stop23h 50mAir China
Deal found 12/11£520
Tue 12/521:20LHR - CNX
1 stop34h 05mChina Eastern
Wed 27/516:20CNX - LHR
2 stops32h 20mChina Eastern
Deal found 12/11£564
Mon 29/1221:10LHR - CNX
2 stops36h 50mMultiple Airlines
Sat 17/108:50CNX - LHR
1 stop28h 50mMultiple Airlines
Deal found 13/11£634
Mon 8/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Mon 30/316:20CNX - LHR
2 stops32h 20mChina Eastern
Deal found 12/11£661
Last-minute flights from Heathrow to Chiang Mai
Discover last-minute flight deals from Heathrow to Chiang Mai. Data last updated 14 November 2025 and is based on user searches.
Wed 19/1121:00LHR - CNX
1 stop34h 20mChina Eastern
Wed 3/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 13/11£515
Thu 20/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/110:05CNX - LHR
2 stops38h 25mChina Eastern
Deal found 12/11£517
Thu 20/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Tue 20/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 12/11£518
Fri 21/1117:40LHR - CNX
1 stop21h 10mAir China
Sun 30/1123:05CNX - LHR
1 stop25h 45mAir China
Deal found 13/11£508
Sat 22/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Sat 6/1215:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 13/11£522
Sun 23/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 12/11£511
Thu 27/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 11/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 13/11£523
Sun 30/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 13/11£509
Tue 2/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Fri 12/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 12/11£521
One-way flights from Heathrow to Chiang Mai
Search for one-way flight options from Heathrow to Chiang Mai. Find affordable one-way fares based on user searches. Data last updated 14 November 2025.
Thu 8/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 13/11£336
Mon 5/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 13/11£337
Thu 15/122:15LHR - CNX
3 stops39h 05mMultiple Airlines
Deal found 13/11£337
Tue 17/219:20LHR - CNX
1 stop27h 45mEtihad Airways
Deal found 13/11£339
Mon 26/121:10LHR - CNX
2 stops36h 50mMultiple Airlines
Deal found 13/11£340
Wed 7/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 13/11£340
Mon 8/1221:10LHR - CNX
2 stops36h 50mMultiple Airlines
Deal found 12/11£341
Mon 12/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 13/11£344
Thu 12/213:55LHR - CNX
1 stop33h 10mEtihad Airways
Deal found 13/11£347
Thu 19/220:55LHR - CNX
1 stop26h 10mEtihad Airways
Deal found 12/11£348
Fri 9/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 13/11£349
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow to Chiang Mai that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chiang Mai that are best for you.
Fly from
Heathrow
Fly to
Chiang Mai
Route
Depart
Return
Price
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sun 11/1
20:25-21:50
1 stop18h 25m
Chiang Mai
Wed 11/2
23:05-15:55
1 stop23h 50m
£519
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Fri 9/1
17:40-21:50
1 stop21h 10m
Chiang Mai
Mon 19/1
23:05-15:55
1 stop23h 50m
£520
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Tue 3/3
21:00-14:20
1 stop34h 20m
Chiang Mai
Sat 7/3
16:25-17:30
2 stops56h 05m
£544
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Tue 12/5
21:20-13:25
1 stop34h 05m
Chiang Mai
Wed 27/5
16:20-18:40
2 stops32h 20m
£564
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Tue 17/2
19:25-21:00
2 stops18h 35m
Chiang Mai
Tue 10/3
09:25-21:40
2 stops19h 15m
£574
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Tue 12/5
17:50-19:10
2 stops19h 20m
Chiang Mai
Wed 27/5
20:00-18:40
2 stops28h 40m
£587
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Fri 20/2
19:20-09:25
2 stops31h 05m
Chiang Mai
Sat 28/2
08:50-18:10
1 stop16h 20m
£619
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Mon 29/12
21:10-17:00
2 stops36h 50m
Chiang Mai
Sat 17/1
08:50-06:40
1 stop28h 50m
£634
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Mon 8/12
21:00-09:05
2 stops29h 05m
Chiang Mai
Mon 30/3
16:20-18:40
2 stops32h 20m
£661
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Mon 9/3
20:25-21:50
1 stop18h 25m
£337
Flights are sorted by cheapest return flights first.
Deals found on 12/11
Showing 1-10 of 20 results
1
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Best time to book a flight from Heathrow to Chiang Mai
Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Chiang Mai
Prices
More
How far ahead should I book a flight from London Heathrow Airport to Chiang Mai?
Use this chart to determine the optimal time to book a return flight from Heathrow to Chiang Mai. Price data was last updated on 7 November 2025.
The price you pay for your flight from London Heathrow Airport to Chiang Mai may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from London Heathrow Airport to Chiang Mai?
Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Chiang Mai (average of £431). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £661). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LHR to CNX?
Find hourly flight availability from Heathrow to Chiang Mai. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 November 2025.
It’s typically best to fly out from London Heathrow Airport to Chiang Mai in the afternoon. Doing so could potentially save you 71% on the flight price compared to flying at midday, which is usually more expensive.
What’s the top stopover airport for flights from London Heathrow Airport to Chiang Mai?
Share of one-stop return flights from London Heathrow Airport to Chiang Mai chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Bangkok (BKK) – chosen by Cheapflights users on 61% of one-stop itineraries from London Heathrow Airport to Chiang Mai on Cheapflights.
What’s the fastest stopover option from London Heathrow Airport to Chiang Mai?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Chiang Mai, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Abu Dhabi (AUH) have the shortest average one-way travel time for one-stop routes: 15h 23m.
What’s the fastest stopover option from London Heathrow Airport to Chiang Mai?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Chiang Mai, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Abu Dhabi (AUH) have the shortest average one-way travel time for one-stop routes: 15h 23m.
Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Chiang Mai?
Average stopover duration for one-stop one-way flights from London Heathrow Airport to Chiang Mai, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Abu Dhabi (AUH) offer the fastest connection on this route, with an average stopover time of 2h 28m.
Reviews of airlines servicing Chiang Mai
Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated 14 November 2025.
Get a feel of what it's like to fly with EVA Air, Thai Airways, andEtihad Airways from London Heathrow Airport to Chiang Mai by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Chiang Mai from London Heathrow?
For a flight from London Heathrow to Chiang Mai, you will be flying into Chiang Mai. Chiang Mai (CNX) is just 1.9 mi from the center of the city. Chiang Mai is the only Chiang Mai airport and it handles 0 inbound flights from London Heathrow per day. 9 airlines have flights to Chiang Mai from London Heathrow on a regular basis.
How long is the flight from London Heathrow Airport to Chiang Mai?
Departing from London Heathrow Airport to Chiang Mai will take you 18h 25m. There are 5598 mi between London Heathrow Airport and Chiang Mai. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Chiang Mai round-trip?
Flying on China Southern is currently your cheapest option to Chiang Mai, with prices starting at £428. Additional return tickets that might be worth considering are offered by China Eastern and Air China, with the lowest prices starting at £465 and £465, respectively. Users have found that China Southern is 44% cheaper than the other options available to this destination.
Can I find deals for business class flights from Heathrow to Chiang Mai?
Yes. Cheapflights offers flight deals from Heathrow to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Chiang Mai?
Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Chiang Mai (average of £431). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £661). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Chiang Mai departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 14 November 2025.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 14 November 2025.
Discover the top 9 airlines that operate flights from Heathrow to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 November 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to Chiang Mai?
Cheapflights helps you search for flights from Heathrow to Chiang Mai via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Heathrow to Chiang Mai?
Cheapflights helps you find that perfect flight to Chiang Mai from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Heathrow to Chiang Mai with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Chiang Mai, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Heathrow to Chiang Mai become cheaper?
Yes, Cheapflights offers price alerts on Heathrow to Chiang Mai flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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