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Cheap flights from London Heathrow Airport to Chiang Mai from £283

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 20/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Air China Logo
17:40 - 21:50
LHR
-
CNX
21h 10m
1 stop
Air China Logo
23:05 - 17:50
CNX
-
LHR
25h 45m
1 stop
£510Air China
Fri, 13 Nov - Fri, 20 Nov
China Eastern Logo
21:20 - 09:15
LHR
-
CNX
29h 55m
2 stops
China Eastern Logo
15:35 - 17:30
CNX
-
LHR
32h 55m
1 stop
£514China Eastern
Sat, 12 Sep - Sun, 22 Nov
Air China Logo
17:40 - 21:50
LHR
-
CNX
21h 10m
1 stop
Air China Logo
23:05 - 15:55
CNX
-
LHR
23h 50m
1 stop
£515Air China
Fri, 13 Nov - Fri, 20 Nov
China Eastern Logo
21:00 - 09:05
LHR
-
CNX
29h 05m
2 stops
China Eastern Logo
15:35 - 17:30
CNX
-
LHR
32h 55m
1 stop
£530China Eastern
Mon, 9 Nov - Mon, 30 Nov
China Eastern Logo
21:00 - 14:20
LHR
-
CNX
34h 20m
1 stop
China Eastern Logo
15:35 - 17:30
CNX
-
LHR
32h 55m
1 stop
£531China Eastern
Wed, 28 Oct - Thu, 12 Nov
China Eastern Logo
21:00 - 09:05
LHR
-
CNX
29h 05m
2 stops
China Eastern Logo
15:35 - 17:30
CNX
-
LHR
32h 55m
1 stop
£533China Eastern
Wed, 28 Oct - Thu, 12 Nov
China Eastern Logo
21:00 - 09:05
LHR
-
CNX
29h 05m
2 stops
China Eastern Logo
16:25 - 17:30
CNX
-
LHR
32h 05m
2 stops
£533China Eastern
Wed, 28 Oct - Thu, 12 Nov
China Eastern Logo
21:00 - 09:05
LHR
-
CNX
29h 05m
2 stops
China Eastern Logo
10:05 - 17:30
CNX
-
LHR
38h 25m
2 stops
£536China Eastern
Wed, 28 Oct - Thu, 12 Nov
China Eastern Logo
21:20 - 09:15
LHR
-
CNX
53h 55m
3 stops
China Eastern Logo
15:35 - 17:30
CNX
-
LHR
32h 55m
1 stop
£536China Eastern
Sat, 12 Sep - Sun, 22 Nov
China Eastern Logo
21:00 - 14:20
LHR
-
CNX
34h 20m
1 stop
China Eastern Logo
15:35 - 17:30
CNX
-
LHR
32h 55m
1 stop
£537China Eastern
Sun, 1 Nov - Sun, 15 Nov

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
12 Sept
LHR21:20London Heathrow
29h 55m
2 stops
CNX09:15Chiang Mai
22 Nov
CNX15:35Chiang Mai
32h 55m
1 stop
LHR17:30London Heathrow
£514
China Eastern
28 Oct
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
12 Nov
CNX15:35Chiang Mai
32h 55m
1 stop
LHR17:30London Heathrow
£531
China Eastern
28 Oct
LHR21:00London Heathrow
29h 05m
2 stops
CNX09:05Chiang Mai
12 Nov
CNX15:35Chiang Mai
32h 55m
1 stop
LHR17:30London Heathrow
£533

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
16 Nov
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
30 Nov
CNX23:05Chiang Mai
25h 45m
1 stop
LHR17:50London Heathrow
£501
Air China
13 Nov
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
20 Nov
CNX23:05Chiang Mai
25h 45m
1 stop
LHR17:50London Heathrow
£510
Air China
13 Nov
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
20 Nov
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
£515

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 28 May 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

Fri 13/11

17:40-21:50

1 stop21h 10m

Chiang Mai

Fri 20/11

23:05-17:50

1 stop25h 45m

£510

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sat 12/9

21:20-09:15

2 stops29h 55m

Chiang Mai

Sun 22/11

15:35-17:30

1 stop32h 55m

£514
Fastest return journey

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Fri 13/11

17:40-21:50

1 stop21h 10m

Chiang Mai

Fri 20/11

23:05-15:55

1 stop23h 50m

£515

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Mon 9/11

21:00-09:05

2 stops29h 05m

Chiang Mai

Mon 30/11

15:35-17:30

1 stop32h 55m

£530

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 28/10

21:00-14:20

1 stop34h 20m

Chiang Mai

Thu 12/11

15:35-17:30

1 stop32h 55m

£531

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 28/10

21:00-09:05

2 stops29h 05m

Chiang Mai

Thu 12/11

15:35-17:30

1 stop32h 55m

£533

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 28/10

21:00-09:05

2 stops29h 05m

Chiang Mai

Thu 12/11

16:25-17:30

2 stops32h 05m

£533

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 28/10

21:00-09:05

2 stops29h 05m

Chiang Mai

Thu 12/11

10:05-17:30

2 stops38h 25m

£536

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sat 12/9

21:20-09:15

3 stops53h 55m

Chiang Mai

Sun 22/11

15:35-17:30

1 stop32h 55m

£536

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sun 1/11

21:00-14:20

1 stop34h 20m

Chiang Mai

Sun 15/11

15:35-17:30

1 stop32h 55m

£537

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?

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 £571. 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 £606.

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 £735 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 £536 on momondo.

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

You could potentially save up to 28% 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 May 2026, prices for London Heathrow Airport to Chiang Mai flights are approximately 24% 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

17h 10m

Direct flights

None
The fastest flight from London Heathrow Airport to Chiang Mai takes 17h 10m
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 17h 10m.

  • 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 £376Free CancellationRating
7.3
218 reviews
Search China Eastern flights
Air ChinaPriceFrom £393Free CancellationRating
7.3
152 reviews
Search Air China flights
Malaysia AirlinesPriceFrom £508Free CancellationRating
7.4
309 reviews
Search Malaysia Airlines flights
Etihad AirwaysPriceFrom £530Free CancellationRating
7.3
1,445 reviews
Search Etihad Airways flights
Austrian AirlinesPriceFrom £557Free CancellationRating
7.6
921 reviews
Search Austrian Airlines flights
Cathay PacificPriceFrom £685Free CancellationRating
7.6
1,346 reviews
Search Cathay Pacific flights
EVA AirPriceFrom £747Free CancellationRating
8.5
1,459 reviews
Search EVA Air flights
Thai AirwaysPriceFrom £753Free CancellationRating
7.9
402 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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