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Cheap flights from London Heathrow Airport to Chiang Mai from £280

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Chiang Mai departing on 15/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
China Eastern Logo
10:05 - 18:40
CNX
-
LHR
62h 35m
2 stops
£438China Eastern
Sun, 3 May - Sat, 16 May
Air China Logo
22:40 - 21:50
LHR
-
CNX
17h 10m
1 stop
Air China Logo
23:05 - 20:25
CNX
-
LHR
27h 20m
1 stop
£441Air China
Sun, 3 May - Sat, 16 May
China Eastern Logo
21:20 - 09:15
LHR
-
CNX
29h 55m
3 stops
China Eastern Logo
16:10 - 18:40
CNX
-
LHR
56h 30m
2 stops
£444China Eastern
Sun, 3 May - Sat, 16 May
China Eastern Logo
21:20 - 15:20
LHR
-
CNX
36h 00m
3 stops
China Eastern Logo
16:25 - 17:30
CNX
-
LHR
32h 05m
2 stops
£454China Eastern
Tue, 8 Sep - Tue, 8 Dec
China Eastern Logo
21:20 - 09:15
LHR
-
CNX
29h 55m
2 stops
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£457China Eastern
Tue, 2 Jun - Mon, 15 Jun
Air China Logo
22:40 - 21:50
LHR
-
CNX
17h 10m
1 stop
Air China Logo
23:05 - 20:25
CNX
-
LHR
27h 20m
1 stop
£459Air China
Wed, 3 Jun - Sat, 20 Jun
China Eastern Logo
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£461China Eastern
Wed, 13 May - Sun, 17 May
Air China Logo
22:40 - 21:50
LHR
-
CNX
17h 10m
1 stop
Air China Logo
23:05 - 17:40
CNX
-
LHR
24h 35m
1 stop
£462Air China
Sun, 3 May - Tue, 16 Jun
China Eastern Logo
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£462China Eastern
Wed, 13 May - Sun, 17 May
China Eastern Logo
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£463China Eastern
Wed, 13 May - Sun, 17 May

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
3 May
LHR21:20London Heathrow
34h 05m
1 stop
CNX13:25Chiang Mai
16 May
CNX10:05Chiang Mai
62h 35m
2 stops
LHR18:40London Heathrow
£438
China Eastern
3 May
LHR21:20London Heathrow
29h 55m
3 stops
CNX09:15Chiang Mai
16 May
CNX16:10Chiang Mai
56h 30m
2 stops
LHR18:40London Heathrow
£444
China Eastern
8 Sept
LHR21:20London Heathrow
36h 00m
3 stops
CNX15:20Chiang Mai
8 Dec
CNX16:25Chiang Mai
32h 05m
2 stops
LHR17:30London Heathrow
£454

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
3 May
LHR22:40London Heathrow
17h 10m
1 stop
CNX21:50Chiang Mai
16 May
CNX23:05Chiang Mai
27h 20m
1 stop
LHR20:25London Heathrow
£441
Air China
3 Jun
LHR22:40London Heathrow
17h 10m
1 stop
CNX21:50Chiang Mai
20 Jun
CNX23:05Chiang Mai
27h 20m
1 stop
LHR20:25London Heathrow
£459
Air China
3 May
LHR22:40London Heathrow
17h 10m
1 stop
CNX21:50Chiang Mai
16 Jun
CNX23:05Chiang Mai
24h 35m
1 stop
LHR17:40London Heathrow
£462

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 13 March 2026.
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 - CNX

LHRCNX

London Heathrow

Sun 3/5

21:20-13:25

1 stop34h 05m

Chiang Mai

Sat 16/5

10:05-18:40

2 stops62h 35m

£438

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sun 3/5

22:40-21:50

1 stop17h 10m

Chiang Mai

Sat 16/5

23:05-20:25

1 stop27h 20m

£441

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sun 3/5

21:20-09:15

3 stops29h 55m

Chiang Mai

Sat 16/5

16:10-18:40

2 stops56h 30m

£444

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 8/9

21:20-15:20

3 stops36h 00m

Chiang Mai

Tue 8/12

16:25-17:30

2 stops32h 05m

£454

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 2/6

21:20-09:15

2 stops29h 55m

Chiang Mai

Mon 15/6

14:55-18:40

1 stop33h 45m

£457

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 3/6

22:40-21:50

1 stop17h 10m

Chiang Mai

Sat 20/6

23:05-20:25

1 stop27h 20m

£459

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 13/5

21:20-13:25

1 stop34h 05m

Chiang Mai

Sun 17/5

14:55-18:40

1 stop33h 45m

£461
Fastest return journey

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sun 3/5

22:40-21:50

1 stop17h 10m

Chiang Mai

Tue 16/6

23:05-17:40

1 stop24h 35m

£462

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 13/5

21:20-13:25

1 stop34h 05m

Chiang Mai

Sun 17/5

14:55-18:40

1 stop33h 45m

£462

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 13/5

21:20-13:25

1 stop34h 05m

Chiang Mai

Sun 17/5

14:55-18:40

1 stop33h 45m

£463

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 cheapest month to fly to Chiang Mai?

The month of May is, on average, the cheapest month to fly to Chiang Mai from London Heathrow Airport, with most prices found around £613. If you aren’t able to travel during the month of May, then book flights to Chiang Mai from London Heathrow Airport during June instead. Flights to Chiang Mai in June, while not as cheap as those in May, still average around £615.

How far in advance should I book a flight 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 £629 on momondo.

Can stopping save me money on London Heathrow Airport to Chiang Mai flights?

You could potentially save up to 35% on your flight if you consider stops on a London Heathrow Airport to Chiang Mai flight.

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

As of March 2026, prices for London Heathrow Airport to Chiang Mai flights are approximately 36% 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

Fastest flight time

14h 55m

Direct flights

None
The fastest flight from London Heathrow Airport to Chiang Mai takes 14h 55m
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

  • 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 14h 55m.

  • 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 £381Free CancellationRating
7.2
198 reviews
Search China Eastern flights
Air ChinaPriceFrom £397Free CancellationRating
7.3
141 reviews
Search Air China flights
Malaysia AirlinesPriceFrom £515Free CancellationRating
7.3
295 reviews
Search Malaysia Airlines flights
Etihad AirwaysPriceFrom £538Free CancellationRating
7.3
1,426 reviews
Search Etihad Airways flights
Austrian AirlinesPriceFrom £564Free CancellationRating
7.6
901 reviews
Search Austrian Airlines flights
EVA AirPriceFrom £609Free CancellationRating
8.4
1,373 reviews
Search EVA Air flights
Cathay PacificPriceFrom £688Free CancellationRating
7.6
1,205 reviews
Search Cathay Pacific flights
Thai AirwaysPriceFrom £726Free CancellationRating
7.8
392 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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