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Cheap flights from London Heathrow Airport to Chiang Mai from £245

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.
Air China Logo
22:40 - 21:50LHR  London Heathrow-CNX Chiang Mai
17h 10m1 stop Beijing Capital
Air China Logo
23:05 - 20:25CNX  Chiang Mai-LHR London Heathrow
27h 20m1 stop Beijing Capital
£372Air China
Tue, 29 Sep - Mon, 12 Oct
Air China Logo
22:40 - 21:50LHR  London Heathrow-CNX Chiang Mai
17h 10m1 stop Beijing Capital
Air China Logo
23:05 - 17:40CNX  Chiang Mai-LHR London Heathrow
24h 35m1 stop Beijing Capital
£373Air China
Fri, 25 Sep - Mon, 12 Oct
China Eastern Logo
21:00 - 14:20LHR  London Heathrow-CNX Chiang Mai
34h 20m1 stop Shanghai Pu Dong
China Eastern Logo
15:35 - 17:30CNX  Chiang Mai-LHR London Heathrow
32h 55m1 stop Shanghai Pu Dong
£432China Eastern
Sun, 8 Nov - Mon, 23 Nov
China Eastern Logo
21:00 - 14:20LHR  London Heathrow-CNX Chiang Mai
34h 20m1 stop Shanghai Pu Dong
China Eastern Logo
15:35 - 17:30CNX  Chiang Mai-LHR London Heathrow
32h 55m1 stop Shanghai Pu Dong
£438China Eastern
Wed, 2 Dec - Fri, 18 Dec
Multiple Airlines Logo
21:20 - 13:25LHR  London Heathrow-CNX Chiang Mai
34h 05m1 stop Shanghai Pu Dong
Multiple Airlines Logo
09:10 - 12:05CNX  Chiang Mai-LHR London Heathrow
33h 55m1 stop Abu Dhabi Zayed Intl
£493Multiple Airlines
Mon, 19 Oct - Mon, 26 Oct
Multiple Airlines Logo
21:20 - 09:15LHR  London Heathrow-CNX Chiang Mai
29h 55m2 stops Shanghai Pu Dong Kunming Changshui
Multiple Airlines Logo
09:10 - 12:05CNX  Chiang Mai-LHR London Heathrow
33h 55m1 stop Abu Dhabi Zayed Intl
£495Multiple Airlines
Mon, 19 Oct - Mon, 26 Oct
Etihad Airways Logo
21:45 - 09:20LHR  London Heathrow-CNX Chiang Mai
29h 35m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
10:10 - 07:00CNX  Chiang Mai-LHR London Heathrow
26h 50m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
£580Etihad Airways
Wed, 30 Sep - Wed, 7 Oct
Etihad Airways Logo
20:45 - 09:20LHR  London Heathrow-CNX Chiang Mai
30h 35m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
09:10 - 06:40CNX  Chiang Mai-LHR London Heathrow
28h 30m1 stop Abu Dhabi Zayed Intl
£587Etihad Airways
Tue, 29 Sep - Wed, 9 Dec
Austrian Airlines Logo
19:25 - 19:00LHR  London Heathrow-CNX Chiang Mai
16h 35m2 stops Vienna Intl Bangkok Suvarnabhumi
Austrian Airlines Logo
10:10 - 08:20CNX  Chiang Mai-LHR London Heathrow
29h 10m2 stops Bangkok Suvarnabhumi Vienna Intl
£614Austrian Airlines
Thu, 21 Jan - Mon, 8 Feb
Austrian Airlines Logo
19:25 - 19:00LHR  London Heathrow-CNX Chiang Mai
16h 35m2 stops Vienna Intl Bangkok Suvarnabhumi
Austrian Airlines Logo
10:10 - 21:40CNX  Chiang Mai-LHR London Heathrow
18h 30m2 stops Bangkok Suvarnabhumi Vienna Intl
£615Austrian Airlines
Wed, 13 Jan - Fri, 29 Jan

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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
29 Sept
LHR22:40London Heathrow
17h 10m
1 stop
CNX21:50Chiang Mai
12 Oct
CNX23:05Chiang Mai
27h 20m
1 stop
LHR20:25London Heathrow
£372
Air China
25 Sept
LHR22:40London Heathrow
17h 10m
1 stop
CNX21:50Chiang Mai
12 Oct
CNX23:05Chiang Mai
24h 35m
1 stop
LHR17:40London Heathrow
£373
Air China
29 Sept
LHR22:40London Heathrow
17h 10m
1 stop
CNX21:50Chiang Mai
9 Dec
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
£379

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
8 Nov
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
23 Nov
CNX15:35Chiang Mai
32h 55m
1 stop
LHR17:30London Heathrow
£432
China Eastern
13 Sept
LHR21:20London Heathrow
34h 05m
1 stop
CNX13:25Chiang Mai
13 Oct
CNX14:55Chiang Mai
33h 45m
1 stop
LHR18:40London Heathrow
£437
China Eastern
2 Dec
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
18 Dec
CNX15:35Chiang Mai
32h 55m
1 stop
LHR17:30London Heathrow
£438

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

Tue 29/9

22:40-21:50

1 stop17h 10m

Chiang Mai

Mon 12/10

23:05-20:25

1 stop27h 20m

£372

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Fri 25/9

22:40-21:50

1 stop17h 10m

Chiang Mai

Mon 12/10

23:05-17:40

1 stop24h 35m

£373

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Sun 8/11

21:00-14:20

1 stop34h 20m

Chiang Mai

Mon 23/11

15:35-17:30

1 stop32h 55m

£432

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 2/12

21:00-14:20

1 stop34h 20m

Chiang Mai

Fri 18/12

15:35-17:30

1 stop32h 55m

£438

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Mon 19/10

21:20-13:25

1 stop34h 05m

Chiang Mai

Mon 26/10

09:10-12:05

1 stop33h 55m

£493

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Mon 19/10

21:20-09:15

2 stops29h 55m

Chiang Mai

Mon 26/10

09:10-12:05

1 stop33h 55m

£495

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 30/9

21:45-09:20

2 stops29h 35m

Chiang Mai

Wed 7/10

10:10-07:00

2 stops26h 50m

£580

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Tue 29/9

20:45-09:20

2 stops30h 35m

Chiang Mai

Wed 9/12

09:10-06:40

1 stop28h 30m

£587

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Thu 21/1

19:25-19:00

2 stops16h 35m

Chiang Mai

Mon 8/2

10:10-08:20

2 stops29h 10m

£614
Fastest return journey

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 13/1

19:25-19:00

2 stops16h 35m

Chiang Mai

Fri 29/1

10:10-21:40

2 stops18h 30m

£615

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 £662 to £853.
The lowest price recently found on this route was £372.

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 £540. 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 £565.

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 £761 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 £592 on momondo.

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

As of September 2026, prices for London Heathrow Airport to Chiang Mai flights are approximately 42% cheaper 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

£245

Fastest flight time

22h 05m

Direct flights

None
The best one-way flight to Chiang Mai from London Heathrow Airport in the past 72 hours is £245. The best return flight deal from London Heathrow Airport to Chiang Mai found on momondo in the last 72 hours is £372.
The fastest flight from London Heathrow Airport to Chiang Mai takes 22h 05m
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 22h 05m.

  • 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 £374Free CancellationRating
7.3
236 reviews
Search China Eastern flights
Air ChinaPriceFrom £390Free CancellationRating
7.4
163 reviews
Search Air China flights
Malaysia AirlinesPriceFrom £504Free CancellationRating
7.3
318 reviews
Search Malaysia Airlines flights
Etihad AirwaysPriceFrom £527Free CancellationRating
7.3
1,532 reviews
Search Etihad Airways flights
Austrian AirlinesPriceFrom £554Free CancellationRating
7.6
951 reviews
Search Austrian Airlines flights
Thai AirwaysPriceFrom £760Free CancellationRating
7.9
418 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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