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Cheap flights from London Heathrow Airport to Chiang Mai from £317

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to Chiang Mai

Cheap return flights

Enter your travel dates to find the best prices.
China Eastern Logo
21:00 - 12:00LHR  London Heathrow-CNX Chiang Mai
32h 00m2 stops Shanghai Pu Dong Kunming Changshui
China Eastern Logo
15:35 - 06:25CNX  Chiang Mai-LHR London Heathrow
21h 50m1 stop Shanghai Pu Dong
£460China Eastern
Mon, 23 Nov - Mon, 7 Dec
China Eastern Logo
21:00 - 12:00LHR  London Heathrow-CNX Chiang Mai
32h 00m2 stops Shanghai Pu Dong Kunming Changshui
China Eastern Logo
13:00 - 06:25CNX  Chiang Mai-LHR London Heathrow
24h 25m2 stops Kunming Changshui Shanghai Pu Dong
£464China Eastern
Mon, 23 Nov - Mon, 7 Dec
Air China Logo
17:45 - 21:50LHR  London Heathrow-CNX Chiang Mai
21h 05m1 stop Beijing Capital
Air China Logo
23:05 - 15:55CNX  Chiang Mai-LHR London Heathrow
23h 50m1 stop Beijing Capital
£519Air China
Wed, 2 Dec - Wed, 9 Dec
Air China Logo
17:45 - 21:50LHR  London Heathrow-CNX Chiang Mai
21h 05m1 stop Beijing Capital
Air China Logo
23:05 - 15:55CNX  Chiang Mai-LHR London Heathrow
23h 50m1 stop Beijing Capital
£520Air China
Wed, 2 Dec - Wed, 9 Dec
Etihad Airways Logo
20:55 - 09:25LHR  London Heathrow-CNX Chiang Mai
29h 30m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
10:10 - 06:40CNX  Chiang Mai-LHR London Heathrow
27h 30m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
£554Etihad Airways
Sun, 6 Dec - Tue, 15 Dec
Etihad Airways Logo
20:55 - 09:25LHR  London Heathrow-CNX Chiang Mai
29h 30m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
20:55 - 06:40CNX  Chiang Mai-LHR London Heathrow
16h 45m1 stop Abu Dhabi Zayed Intl
£559Etihad Airways
Sun, 6 Dec - Tue, 15 Dec
Multiple Airlines Logo
21:10 - 15:15LHR  London Heathrow-CNX Chiang Mai
35h 05m2 stops Shenzhen Bangkok Suvarnabhumi
Multiple Airlines Logo
20:55 - 12:05CNX  Chiang Mai-LHR London Heathrow
22h 10m1 stop Abu Dhabi Zayed Intl
£570Multiple Airlines
Fri, 27 Nov - Fri, 25 Dec
Multiple Airlines Logo
20:55 - 08:10LHR  London Heathrow-CNX Chiang Mai
28h 15m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
19:45 - 14:30CNX  Chiang Mai-LHR London Heathrow
25h 45m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
£576Multiple Airlines
Thu, 26 Nov - Thu, 17 Dec
Austrian Airlines Logo
12:20 - 19:10LHR  London Heathrow-CNX Chiang Mai
24h 50m2 stops Vienna Intl Bangkok Suvarnabhumi
Austrian Airlines Logo
21:10 - 08:20CNX  Chiang Mai-LHR London Heathrow
17h 10m2 stops Bangkok Suvarnabhumi Vienna Intl
£758Austrian Airlines
Fri, 9 Apr - Wed, 14 Apr
Austrian Airlines Logo
19:25 - 19:00LHR  London Heathrow-CNX Chiang Mai
16h 35m2 stops Vienna Intl Bangkok Suvarnabhumi
Austrian Airlines Logo
09:30 - 21:40CNX  Chiang Mai-LHR London Heathrow
19h 10m2 stops Bangkok Suvarnabhumi Vienna Intl
£797Austrian Airlines
Fri, 5 Mar - Mon, 22 Mar

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China Eastern flights from London Heathrow Airport to Chiang Mai

Our best China Eastern deals on London Heathrow Airport to Chiang Mai flight tickets
China Eastern
16 Nov
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
14 Dec
CNX15:35Chiang Mai
21h 50m
1 stop
LHR06:25London Heathrow
£468
China Eastern
23 Nov
LHR21:00London Heathrow
28h 35m
2 stops
CNX08:35Chiang Mai
7 Dec
CNX16:25Chiang Mai
32h 05m
2 stops
LHR17:30London Heathrow
£471
China Eastern
23 Nov
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
1 Dec
CNX15:35Chiang Mai
32h 55m
1 stop
LHR17:30London Heathrow
£472

Air China flights from London Heathrow Airport to Chiang Mai

Our best Air China deals on London Heathrow Airport to Chiang Mai flight tickets
Air China
2 Dec
LHR17:45London Heathrow
21h 05m
1 stop
CNX21:50Chiang Mai
9 Dec
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
£519
Air China
25 Nov
LHR20:25London Heathrow
18h 25m
1 stop
CNX21:50Chiang Mai
8 Dec
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
£523
Air China
15 Nov
LHR20:25London Heathrow
18h 25m
1 stop
CNX21:50Chiang Mai
30 Nov
CNX23:05Chiang Mai
25h 45m
1 stop
LHR17:50London Heathrow
£541

momondo Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Mon 23/11

21:00-12:00

2 stops32h 00m

Chiang Mai

Mon 7/12

15:35-06:25

1 stop21h 50m

£460

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Mon 23/11

21:00-12:00

2 stops32h 00m

Chiang Mai

Mon 7/12

13:00-06:25

2 stops24h 25m

£464

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 2/12

17:45-21:50

1 stop21h 05m

Chiang Mai

Wed 9/12

23:05-15:55

1 stop23h 50m

£519

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 2/12

17:45-21:50

1 stop21h 05m

Chiang Mai

Wed 9/12

23:05-15:55

1 stop23h 50m

£520

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Sun 6/12

20:55-09:25

2 stops29h 30m

Chiang Mai

Tue 15/12

10:10-06:40

2 stops27h 30m

£554

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Sun 6/12

20:55-09:25

2 stops29h 30m

Chiang Mai

Tue 15/12

20:55-06:40

1 stop16h 45m

£559

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Fri 27/11

21:10-15:15

2 stops35h 05m

Chiang Mai

Fri 25/12

20:55-12:05

1 stop22h 10m

£570

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Thu 26/11

20:55-08:10

2 stops28h 15m

Chiang Mai

Thu 17/12

19:45-14:30

2 stops25h 45m

£576

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Fri 9/4

12:20-19:10

2 stops24h 50m

Chiang Mai

Wed 14/4

21:10-08:20

2 stops17h 10m

£758
Fastest return journey

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Fri 5/3

19:25-19:00

2 stops16h 35m

Chiang Mai

Mon 22/3

09:30-21:40

2 stops19h 10m

£797

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Chiang Mai from

How to get the cheapest flight ticket from London Heathrow Airport to Chiang Mai

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London Heathrow Airport and Chiang Mai?

Prices are currently low for flights on this route.

Typical prices usually range from £485 to £648.
The lowest price recently found on this route was £471.

What is the cheapest month to fly to Chiang Mai?

The month of November is, on average, the cheapest month to fly to Chiang Mai from London Heathrow Airport, with most prices found around £519. If you aren’t able to travel during the month of November, then book flights to Chiang Mai from London Heathrow Airport during May instead. Flights to Chiang Mai in May, while not as cheap as those in November, still average around £564.

How far in advance should I book a flight from London Heathrow Airport to Chiang Mai?

You are more likely to see cheaper flights to Chiang Mai from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chiang Mai for around £760 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chiang Mai from London Heathrow Airport for as low as £556 on momondo.

How have London Heathrow Airport to Chiang Mai flight prices changed over time?

As of November 2026, prices for London Heathrow Airport to Chiang Mai flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Chiang Mai

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Chiang Mai according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Chiang Mai (LHR to CNX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Chiang Mai

Best price found

£317

Fastest flight time

18h 50m

Direct flights

None
The best one-way flight to Chiang Mai from London Heathrow Airport in the past 72 hours is £317. The best return flight deal from London Heathrow Airport to Chiang Mai found on momondo in the last 72 hours is £460.
The fastest flight from London Heathrow Airport to Chiang Mai takes 18h 50m
There are no direct flights from London Heathrow Airport to Chiang Mai. There are no popular flight routes from London Heathrow Airport to Chiang Mai.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Chiang Mai

  • How far is London Heathrow to Chiang Mai by plane?

    A flight from London Heathrow to Chiang Mai will travel around 5597.7 mi. In terms of flight time, this usually takes a little over 18h 50m.

  • When did momondo last update prices for flights from London Heathrow Airport to Chiang Mai Airport?

    Prices for flights from London Heathrow Airport to Chiang Mai Airport refresh daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Chiang Mai Airport?

  • How old do you have to be to fly from London Heathrow Airport to Chiang Mai Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Chiang Mai Airport.

  • What documentation or ID do you need to fly to Chiang Mai Airport?

    The necessary travel and health documents for your Chiang Mai Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London Heathrow Airport to Chiang Mai?

Best airlines flying from London Heathrow Airport to Chiang Mai

Compare and see reviews for airlines that fly from London Heathrow Airport to Chiang Mai with momondo
Airline
Rating
Free Cancellation
Price
China EasternPriceFrom £378Free CancellationRating
7.3
250 reviews
Search China Eastern flights
Air ChinaPriceFrom £385Free CancellationRating
7.5
168 reviews
Search Air China flights
Etihad AirwaysPriceFrom £532Free CancellationRating
7.3
1,555 reviews
Search Etihad Airways flights
Austrian AirlinesPriceFrom £561Free CancellationRating
7.5
982 reviews
Search Austrian Airlines flights
Cathay PacificPriceFrom £689Free CancellationRating
7.6
1,542 reviews
Search Cathay Pacific flights
Thai AirwaysPriceFrom £830Free CancellationRating
7.9
433 reviews
Search Thai Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Chiang Mai?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Chiang Mai for you.

Can I find flights from London to Chiang Mai with flexible booking policies on momondo?

Flights from London to Chiang Mai with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Chiang Mai?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Chiang Mai from London.

I’m not ready to book a flight from London to Chiang Mai right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Chiang Mai now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chiang Mai and let you know when they change.

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