Cheap flights from London Heathrow Airport to Chiang Mai from £335
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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CNX
4 Jan — 11 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 May, booked 76 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 5 December 2025.
Tue 2/1222:10LHR - CNX
2 stops26h 10mMultiple Airlines
Sun 14/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Deal found 2/12£614
Thu 4/1221:35LHR - CNX
2 stops27h 00mMultiple Airlines
Sun 14/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Deal found 2/12£625
Mon 8/1208:25LHR - CNX
2 stops22h 30mMultiple Airlines
Fri 26/1216:25CNX - LHR
2 stops32h 05mMultiple Airlines
Deal found 4/12£627
Sun 7/1220:15LHR - CNX
1 stop30h 35mCathay Pacific
Thu 29/110:35CNX - LHR
1 stop37h 45mCathay Pacific
Deal found 2/12£640
Thu 25/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Tue 3/223:20CNX - LHR
1 stop25h 10mChina Eastern
Deal found 3/12£648
Wed 10/1207:00LHR - CNX
2 stops24h 20mMultiple Airlines
Sun 25/116:25CNX - LHR
2 stops32h 05mMultiple Airlines
Deal found 2/12£666
Tue 2/1221:00LHR - CNX
1 stop34h 20mChina Eastern
Sun 14/1215:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 2/12£668
Wed 3/1211:00LHR - CNX
2 stops27h 10mMultiple Airlines
Wed 17/1215:15CNX - LHR
2 stops23h 00mMultiple Airlines
Deal found 2/12£678
Mon 8/1208:25LHR - CNX
2 stops19h 50mMultiple Airlines
Mon 15/1216:25CNX - LHR
2 stops32h 05mMultiple Airlines
Deal found 3/12£687
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 5 December 2025.
Mon 4/519:30LHR - CNX
2 stops17h 40mAustrian Airlines
Mon 11/521:10CNX - LHR
2 stops17h 10mAustrian Airlines
Deal found 3/12£581
Wed 21/120:20LHR - CNX
2 stops17h 40mEmirates
Mon 2/221:40CNX - LHR
2 stops21h 00mEmirates
Deal found 3/12£796
Sun 1/210:45LHR - CNX
2 stops20h 00mMultiple Airlines
Fri 27/317:05CNX - LHR
2 stops46h 55mMultiple Airlines
Deal found 3/12£881
Thu 25/1211:00LHR - CNX
1 stop39h 50mCathay Pacific
Sun 11/110:35CNX - LHR
1 stop40h 35mCathay Pacific
Deal found 4/12£1,523
Tue 16/1213:55LHR - CNX
1 stop33h 10mEtihad Airways
Sun 28/1208:50CNX - LHR
1 stop28h 50mEtihad Airways
Deal found 3/12£1,566
Tue 16/1209:30LHR - CNX
2 stops26h 30mGulf Air
Thu 8/112:10CNX - LHR
2 stops33h 35mGulf Air
Deal found 4/12£1,614
Thu 18/1217:40LHR - CNX
1 stop21h 10mAir China
Sun 28/1223:05CNX - LHR
1 stop23h 50mAir China
Deal found 3/12£1,688
Mon 15/1208:35LHR - CNX
2 stops17h 50mMultiple Airlines
Wed 14/121:40CNX - LHR
2 stops21h 30mMultiple Airlines
Deal found 4/12£1,294
Wed 17/1208:50LHR - CNX
1 stop14h 15mEtihad Airways
Tue 30/1208:50CNX - LHR
1 stop28h 50mEtihad Airways
Deal found 3/12£1,608
Mon 22/1213:45LHR - CNX
2 stops17h 00mMultiple Airlines
Thu 8/110:10CNX - LHR
2 stops18h 30mMultiple Airlines
Deal found 4/12£1,566
Wed 24/1217:50LHR - CNX
1 stop33h 00mCathay Pacific
Tue 6/110:35CNX - LHR
1 stop25h 50mCathay Pacific
Deal found 4/12£1,722
Wed 24/1222:05LHR - CNX
1 stop28h 45mCathay Pacific
Fri 9/110:35CNX - LHR
1 stop25h 50mCathay Pacific
Deal found 4/12£1,722
Last-minute flights from Heathrow to Chiang Mai
Discover last-minute flight deals from Heathrow to Chiang Mai. Data last updated 5 December 2025 and is based on user searches.
Sun 11/120:25LHR - CNX
1 stop18h 25mAir China
Thu 29/123:05CNX - LHR
1 stop25h 45mAir China
Deal found 4/12£492
Tue 13/117:40LHR - CNX
1 stop21h 10mAir China
Tue 27/123:05CNX - LHR
1 stop25h 45mAir China
Deal found 4/12£507
Wed 14/120:25LHR - CNX
1 stop18h 25mAir China
Tue 27/123:05CNX - LHR
1 stop23h 50mAir China
Deal found 4/12£499
Thu 15/121:00LHR - CNX
2 stops29h 05mChina Eastern
Thu 29/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 3/12£483
Thu 15/120:25LHR - CNX
1 stop18h 25mAir China
Sun 8/223:05CNX - LHR
1 stop23h 50mAir China
Deal found 2/12£492
Thu 15/120:25LHR - CNX
1 stop18h 25mAir China
Thu 22/123:05CNX - LHR
1 stop25h 45mAir China
Deal found 4/12£501
Fri 16/121:00LHR - CNX
2 stops29h 05mChina Eastern
Fri 23/115:35CNX - LHR
1 stop32h 55mChina Eastern
Deal found 1/12£489
Sat 17/120:25LHR - CNX
1 stop18h 25mAir China
Sat 7/223:05CNX - LHR
1 stop25h 45mAir China
Deal found 2/12£490
Wed 21/117:40LHR - CNX
1 stop21h 10mAir China
Mon 2/223:05CNX - LHR
1 stop23h 50mAir China
Deal found 2/12£510
Thu 22/121:00LHR - CNX
2 stops35h 25mChina Eastern
Mon 26/110:05CNX - LHR
2 stops38h 25mChina Eastern
Deal found 1/12£488
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 5 December 2025.
Mon 5/121:10LHR - CNX
2 stops36h 50mMultiple Airlines
Deal found 3/12£335
Sat 17/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 3/12£339
Wed 21/108:50LHR - CNX
1 stop14h 15mEtihad Airways
Deal found 3/12£342
Tue 3/219:20LHR - CNX
1 stop27h 45mEtihad Airways
Deal found 4/12£344
Wed 7/121:00LHR - CNX
2 stops27h 20mMultiple Airlines
Deal found 3/12£346
Mon 19/121:00LHR - CNX
2 stops27h 20mMultiple Airlines
Deal found 3/12£348
Thu 8/121:00LHR - CNX
2 stops27h 35mMultiple Airlines
Deal found 3/12£358
Sat 17/108:50LHR - CNX
1 stop14h 15mEtihad Airways
Deal found 3/12£361
Fri 16/121:10LHR - CNX
3 stops35h 55mMultiple Airlines
Deal found 3/12£363
Sun 18/108:40LHR - CNX
3 stops26h 00mMultiple Airlines
Deal found 3/12£363
Sun 4/117:15LHR - CNX
3 stops31h 40mMultiple Airlines
Deal found 3/12£370
Thu 15/106:50LHR - CNX
3 stops27h 55mMultiple Airlines
Deal found 3/12£372
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 5 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 5 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 4/5
19:30-19:10
2 stops17h 40m
Chiang Mai
Mon 11/5
21:10-08:20
2 stops17h 10m
£581
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Wed 21/1
20:20-21:00
2 stops17h 40m
Chiang Mai
Mon 2/2
21:40-11:40
2 stops21h 00m
£796
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Sun 1/2
10:45-13:45
2 stops20h 00m
Chiang Mai
Fri 27/3
17:05-09:00
2 stops46h 55m
£881
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Mon 15/12
08:35-09:25
2 stops17h 50m
Chiang Mai
Wed 14/1
21:40-12:10
2 stops21h 30m
£1,294
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Thu 25/12
11:00-09:50
1 stop39h 50m
Chiang Mai
Sun 11/1
10:35-20:10
1 stop40h 35m
£1,523
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Mon 22/12
13:45-13:45
2 stops17h 00m
Chiang Mai
Thu 8/1
10:10-21:40
2 stops18h 30m
£1,566
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Tue 16/12
13:55-06:05
1 stop33h 10m
Chiang Mai
Sun 28/12
08:50-06:40
1 stop28h 50m
£1,566
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Wed 17/12
08:50-06:05
1 stop14h 15m
Chiang Mai
Tue 30/12
08:50-06:40
1 stop28h 50m
£1,608
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Tue 16/12
09:30-19:00
2 stops26h 30m
Chiang Mai
Thu 8/1
12:10-14:45
2 stops33h 35m
£1,614
LondonChiang Mai
LHR - CNX
LHRCNX
London Heathrow
Thu 18/12
17:40-21:50
1 stop21h 10m
Chiang Mai
Sun 28/12
23:05-15:55
1 stop23h 50m
£1,688
Flights are sorted by cheapest return flights first.
Deals found on 3/12
Showing 1-10 of 23 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 28 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 76 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 £425). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £652). 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 5 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.
How much does it cost for a return flight from London Heathrow Airport to Chiang Mai?
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 59% 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 £525.
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 21m.
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 26m.
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 5 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 17h 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 Southern is currently your cheapest option to Chiang Mai, with prices starting at £422. Additional return tickets that might be worth considering are offered by Air China and China Eastern, with the lowest prices starting at £450 and £458, respectively. Users have found that China Southern is 44% 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?
£311 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 EVA Air, with prices starting from £376 and £427, 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 £425). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £652). 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 5 December 2025.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 5 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 5 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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