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Cheap flights from London Heathrow Airport to Chiang Mai from £247

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 8/3. 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
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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 - 15:55
CNX
-
LHR
23h 50m
1 stop
£373Air China
Wed, 4 Mar - Wed, 18 Mar
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
£376Air China
Thu, 12 Mar - Thu, 19 Mar
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
£378Air China
Thu, 12 Mar - Thu, 19 Mar
China Eastern Logo
21:00 - 22:20
LHR
-
CNX
18h 20m
1 stop
China Eastern Logo
16:25 - 17:30
CNX
-
LHR
32h 05m
2 stops
£391China Eastern
Wed, 4 Mar - Wed, 18 Mar
Air China Logo
17:40 - 21:50
LHR
-
CNX
21h 10m
1 stop
Air China Logo
23:05 - 20:25
CNX
-
LHR
27h 20m
1 stop
£392Air China
Tue, 3 Mar - Tue, 31 Mar
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
£393Air China
Thu, 12 Mar - Thu, 19 Mar
Air China Logo
20:25 - 21:50
LHR
-
CNX
19h 25m
1 stop
Air China Logo
23:05 - 20:25
CNX
-
LHR
27h 20m
1 stop
£400Air China
Wed, 22 Apr - Tue, 19 May
China Eastern Logo
21:00 - 22:20
LHR
-
CNX
18h 20m
1 stop
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£411China Eastern
Tue, 17 Feb - Tue, 31 Mar
Air China Logo
17:40 - 21:50
LHR
-
CNX
21h 10m
1 stop
Air China Logo
23:05 - 17:40
CNX
-
LHR
24h 35m
1 stop
£414Air China
Tue, 3 Mar - Tue, 31 Mar
China Eastern Logo
21:00 - 09:05
LHR
-
CNX
29h 05m
2 stops
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£416China Eastern
Tue, 17 Feb - Tue, 31 Mar

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
4 Mar
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
18 Mar
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
£373
Air China
12 Mar
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
19 Mar
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
£376
Air China
12 Mar
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
19 Mar
CNX23:05Chiang Mai
25h 45m
1 stop
LHR17:50London Heathrow
£378

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
4 Mar
LHR21:00London Heathrow
18h 20m
1 stop
CNX22:20Chiang Mai
18 Mar
CNX16:25Chiang Mai
32h 05m
2 stops
LHR17:30London Heathrow
£391
China Eastern
17 Feb
LHR21:00London Heathrow
18h 20m
1 stop
CNX22:20Chiang Mai
31 Mar
CNX14:55Chiang Mai
33h 45m
1 stop
LHR18:40London Heathrow
£411
China Eastern
17 Feb
LHR21:00London Heathrow
29h 05m
2 stops
CNX09:05Chiang Mai
31 Mar
CNX14:55Chiang Mai
33h 45m
1 stop
LHR18:40London Heathrow
£416

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 January 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

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 4/3

17:40-21:50

1 stop21h 10m

Chiang Mai

Wed 18/3

23:05-15:55

1 stop23h 50m

£373

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Thu 12/3

17:40-21:50

1 stop21h 10m

Chiang Mai

Thu 19/3

23:05-15:55

1 stop23h 50m

£376

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Thu 12/3

17:40-21:50

1 stop21h 10m

Chiang Mai

Thu 19/3

23:05-17:50

1 stop25h 45m

£378

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 4/3

21:00-22:20

1 stop18h 20m

Chiang Mai

Wed 18/3

16:25-17:30

2 stops32h 05m

£391

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 3/3

17:40-21:50

1 stop21h 10m

Chiang Mai

Tue 31/3

23:05-20:25

1 stop27h 20m

£392

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Thu 12/3

17:40-21:50

1 stop21h 10m

Chiang Mai

Thu 19/3

23:05-15:55

1 stop23h 50m

£393

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 22/4

20:25-21:50

1 stop19h 25m

Chiang Mai

Tue 19/5

23:05-20:25

1 stop27h 20m

£400

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 17/2

21:00-22:20

1 stop18h 20m

Chiang Mai

Tue 31/3

14:55-18:40

1 stop33h 45m

£411

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 3/3

17:40-21:50

1 stop21h 10m

Chiang Mai

Tue 31/3

23:05-17:40

1 stop24h 35m

£414

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 17/2

21:00-09:05

2 stops29h 05m

Chiang Mai

Tue 31/3

14:55-18:40

1 stop33h 45m

£416

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 June is, on average, the cheapest month to fly to Chiang Mai from London Heathrow Airport, with most prices found around £630. If you aren’t able to travel during the month of June, then book flights to Chiang Mai from London Heathrow Airport during February instead. Flights to Chiang Mai in February, while not as cheap as those in June, still average around £648.

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 £734 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 £624 on momondo.

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

You could potentially save up to 36% 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 January 2026, prices for London Heathrow Airport to Chiang Mai flights are approximately 37% 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

18h 00m

Direct flights

None
The fastest flight from London Heathrow Airport to Chiang Mai takes 18h 00m
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 18h 00m.

  • 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 £368Free CancellationRating
7.2
191 reviews
Search China Eastern flights
Air ChinaPriceFrom £394Free CancellationRating
7.2
138 reviews
Search Air China flights
Malaysia AirlinesPriceFrom £498Free CancellationRating
7.3
290 reviews
Search Malaysia Airlines flights
Etihad AirwaysPriceFrom £520Free CancellationRating
7.3
1,376 reviews
Search Etihad Airways flights
EVA AirPriceFrom £540Free CancellationRating
8.4
1,334 reviews
Search EVA Air flights
Austrian AirlinesPriceFrom £545Free CancellationRating
7.5
895 reviews
Search Austrian Airlines flights
Cathay PacificPriceFrom £665Free CancellationRating
7.6
1,147 reviews
Search Cathay Pacific flights
Thai AirwaysPriceFrom £690Free CancellationRating
7.8
380 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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