Cheap flights from London Heathrow Airport to Chiang Mai from £339
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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CNX
17 Jan — 24 Jan1
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 June or November, booked 44 days in advance, depart on a Sunday or Monday and return on a Monday
Cheap flight deals from Heathrow to Chiang Mai
Enter your travel dates to find the best prices.
Cheapest flights from Heathrow to Chiang Mai
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 18 December 2025.
Mon 29/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Wed 4/223:20CNX - LHR
1 stop25h 10mChina Eastern
Deal found 17/12£854
Sun 21/1220:05LHR - CNX
2 stops18h 45mMultiple Airlines
Wed 7/114:20CNX - LHR
2 stops36h 00mMultiple Airlines
Deal found 16/12£883
Thu 25/1222:00LHR - CNX
1 stop36h 50mChina Southern
Sun 18/118:50CNX - LHR
1 stop29h 10mChina Southern
Deal found 16/12£910
Thu 25/1220:55LHR - CNX
1 stop26h 10mEtihad Airways
Sun 18/108:50CNX - LHR
1 stop36h 40mEtihad Airways
Deal found 17/12£950
Sat 27/1221:00LHR - CNX
1 stop34h 20mChina Eastern
Tue 27/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 16/12£967
Sat 27/1208:50LHR - CNX
1 stop14h 15mEtihad Airways
Tue 27/108:50CNX - LHR
1 stop16h 20mEtihad Airways
Deal found 17/12£1,008
Thu 25/1222:00LHR - CNX
1 stop36h 50mChina Southern
Sat 17/118:50CNX - LHR
1 stop30h 45mChina Southern
Deal found 16/12£1,020
Fri 26/1217:50LHR - CNX
1 stop33h 00mCathay Pacific
Mon 12/110:35CNX - LHR
1 stop37h 45mCathay Pacific
Deal found 16/12£1,032
Thu 25/1208:40LHR - CNX
2 stops17h 45mMultiple Airlines
Sun 18/121:40CNX - LHR
2 stops21h 35mMultiple Airlines
Deal found 16/12£1,049
Wed 31/1221:00LHR - CNX
1 stop34h 20mChina Eastern
Tue 6/116:25CNX - LHR
2 stops56h 05mChina Eastern
Deal found 16/12£1,056
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 18 December 2025.
Mon 9/221:00LHR - CNX
2 stops28h 40mChina Eastern
Sun 15/223:20CNX - LHR
1 stop25h 10mChina Eastern
Deal found 17/12£485
Sun 25/113:55LHR - CNX
1 stop33h 15mEtihad Airways
Thu 5/208:50CNX - LHR
1 stop36h 40mEtihad Airways
Deal found 17/12£564
Mon 15/613:45LHR - CNX
2 stops18h 00mMultiple Airlines
Tue 23/608:45CNX - LHR
1 stop28h 15mMultiple Airlines
Deal found 17/12£591
Sat 18/421:35LHR - CNX
1 stop32h 05mMalaysia Airlines
Wed 29/412:35CNX - LHR
1 stop34h 00mMalaysia Airlines
Deal found 17/12£622
Sat 24/122:00LHR - CNX
1 stop36h 50mChina Southern
Tue 3/218:50CNX - LHR
2 stops30h 45mChina Southern
Deal found 17/12£645
Wed 21/110:25LHR - CNX
1 stop20h 25mMalaysia Airlines
Thu 5/214:50CNX - LHR
1 stop31h 35mMalaysia Airlines
Deal found 17/12£633
Fri 9/113:55LHR - CNX
1 stop33h 15mEtihad Airways
Thu 22/108:50CNX - LHR
1 stop16h 20mEtihad Airways
Deal found 16/12£644
Fri 23/110:25LHR - CNX
1 stop20h 25mMalaysia Airlines
Wed 4/212:25CNX - LHR
1 stop34h 00mMalaysia Airlines
Deal found 17/12£633
Fri 9/119:20LHR - CNX
1 stop27h 50mEtihad Airways
Sat 7/208:50CNX - LHR
1 stop34h 15mEtihad Airways
Deal found 16/12£649
Sun 25/121:25LHR - CNX
1 stop33h 25mMalaysia Airlines
Wed 4/212:25CNX - LHR
1 stop34h 00mMalaysia Airlines
Deal found 17/12£636
Sat 18/421:35LHR - CNX
1 stop32h 05mMalaysia Airlines
Mon 4/512:35CNX - LHR
1 stop23h 20mMalaysia Airlines
Deal found 17/12£643
Last-minute flights from Heathrow to Chiang Mai
Discover last-minute flight deals from Heathrow to Chiang Mai. Data last updated 18 December 2025 and is based on user searches.
Mon 12/121:00LHR - CNX
1 stop34h 20mChina Eastern
Sun 25/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 17/12£395
Wed 14/121:00LHR - CNX
1 stop34h 20mChina Eastern
Wed 21/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 17/12£408
Thu 15/121:00LHR - CNX
1 stop34h 20mChina Eastern
Thu 22/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 16/12£394
Sun 25/121:00LHR - CNX
1 stop34h 20mChina Eastern
Wed 4/215:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 17/12£392
Wed 28/121:00LHR - CNX
2 stops29h 05mChina Eastern
Mon 2/216:25CNX - LHR
2 stops32h 05mChina Eastern
Deal found 16/12£416
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 18 December 2025.
Sun 15/208:40LHR - CNX
3 stops22h 20mMultiple Airlines
Deal found 16/12£339
Wed 4/308:50LHR - CNX
1 stop14h 20mEtihad Airways
Deal found 16/12£340
Sun 25/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 17/12£342
Sun 25/121:10LHR - CNX
3 stops36h 30mMultiple Airlines
Deal found 16/12£348
Sat 21/222:15LHR - CNX
3 stops32h 45mMultiple Airlines
Deal found 16/12£351
Sun 22/320:25LHR - CNX
1 stop18h 25mAir China
Deal found 17/12£351
Fri 30/121:25LHR - CNX
1 stop31h 00mMalaysia Airlines
Deal found 17/12£360
Tue 14/420:00LHR - CNX
3 stops38h 50mMultiple Airlines
Deal found 16/12£360
Find 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 18 December 2025.
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 18 December 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
Mon 9/2
21:00-08:40
2 stops28h 40m
Chiang Mai
Sun 15/2
23:20-17:30
1 stop25h 10m
£485
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sun 25/1
13:55-06:10
1 stop33h 15m
Chiang Mai
Thu 5/2
08:50-14:30
1 stop36h 40m
£564
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Mon 15/6
13:45-13:45
2 stops18h 00m
Chiang Mai
Tue 23/6
08:45-07:00
1 stop28h 15m
£591
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sat 18/4
21:35-11:40
1 stop32h 05m
Chiang Mai
Wed 29/4
12:35-16:35
1 stop34h 00m
£622
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Wed 21/1
10:25-13:50
1 stop20h 25m
Chiang Mai
Thu 5/2
14:50-15:25
1 stop31h 35m
£633
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Fri 23/1
10:25-13:50
1 stop20h 25m
Chiang Mai
Wed 4/2
12:25-15:25
1 stop34h 00m
£633
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sun 25/1
21:25-13:50
1 stop33h 25m
Chiang Mai
Wed 4/2
12:25-15:25
1 stop34h 00m
£636
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sat 18/4
21:35-11:40
1 stop32h 05m
Chiang Mai
Mon 4/5
12:35-05:55
1 stop23h 20m
£643
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Fri 9/1
13:55-06:10
1 stop33h 15m
Chiang Mai
Thu 22/1
08:50-18:10
1 stop16h 20m
£644
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sat 24/1
22:00-17:50
1 stop36h 50m
Chiang Mai
Tue 3/2
18:50-18:35
2 stops30h 45m
£645
Flights are sorted by cheapest return flights first.
Deals found on 16/12
Showing 1-10 of 21 results
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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 12 December 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 £426). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £648). 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 18 December 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 58% of one-stop itineraries from London Heathrow Airport to Chiang Mai on Cheapflights.
What’s the cheapest stopover airport for flights from London Heathrow Airport to Chiang Mai?
Average return fare for one-stop flights from London Heathrow Airport to Chiang Mai, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Guangzhou (CAN) is the most affordable one-stop option, with an average return flight price of £488.
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 19m.
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 24m.
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 18 December 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.
All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.
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 28h 40m. 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 Eastern is currently your cheapest option to Chiang Mai, with prices starting at £394. Additional return tickets that might be worth considering are offered by China Southern and Air China, with the lowest prices starting at £421 and £427, respectively. Users have found that China Eastern is 48% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from London Heathrow Airport to Chiang Mai one-way?
£305 is the cheapest one-way deal found within the past few days, from Air China. You may also be able to find cheap deals on Etihad Airways and Thai Airways, with prices starting from £375 and £431, respectively.
Can I find deals for flights from Heathrow to Chiang Mai that include hotel bookings?
Yes. In addition to deals on Heathrow to Chiang Mai flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Chiang Mai?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Chiang Mai.
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 £426). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £648). 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 18 December 2025.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 18 December 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 18 December 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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