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Cheap flights from London Heathrow Airport to Chiang Mai from £308

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 27/11. 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 - 21:50LHR-CNX
21h 10m1 stop
Air China Logo
23:05 - 15:55CNX-LHR
23h 50m1 stop
£486Air China
Find Deal
Thu, 13 Nov - Mon, 24 Nov
Air China Logo
17:40 - 21:50LHR-CNX
21h 10m1 stop
Air China Logo
23:05 - 17:50CNX-LHR
25h 45m1 stop
£488Air China
Find Deal
Wed, 19 Nov - Sun, 23 Nov
Air China Logo
20:25 - 21:50LHR-CNX
18h 25m1 stop
Air China Logo
23:05 - 15:55CNX-LHR
23h 50m1 stop
£490Air China
Find Deal
Thu, 27 Nov - Fri, 5 Dec
Air China Logo
17:40 - 21:50LHR-CNX
21h 10m1 stop
Air China Logo
23:05 - 15:55CNX-LHR
23h 50m1 stop
£491Air China
Find Deal
Tue, 6 Jan - Thu, 22 Jan
Multiple Airlines Logo
21:50 - 08:00LHR-CNX
27h 10m2 stops
Multiple Airlines Logo
21:45 - 19:00CNX-LHR
28h 15m2 stops
£495Multiple Airlines
Find Deal
Fri, 14 Nov - Fri, 21 Nov
China Southern Logo
22:00 - 17:50LHR-CNX
36h 50m1 stop
China Southern Logo
18:50 - 18:35CNX-LHR
30h 45m2 stops
£503China Southern
Find Deal
Sun, 16 Nov - Sun, 30 Nov
China Southern Logo
22:00 - 17:50LHR-CNX
36h 50m1 stop
China Southern Logo
18:50 - 18:35CNX-LHR
30h 45m2 stops
£507China Southern
Find Deal
Tue, 18 Nov - Sun, 14 Dec
Multiple Airlines Logo
21:00 - 09:05LHR-CNX
29h 05m2 stops
Multiple Airlines Logo
08:50 - 18:10CNX-LHR
16h 20m1 stop
£512Multiple Airlines
Find Deal
Thu, 13 Nov - Thu, 20 Nov
China Eastern Logo
21:00 - 14:20LHR-CNX
34h 20m1 stop
China Eastern Logo
16:25 - 17:30CNX-LHR
32h 05m2 stops
£532China Eastern
Find Deal
Thu, 13 Nov - Mon, 24 Nov
China Eastern Logo
21:00 - 14:20LHR-CNX
34h 20m1 stop
China Eastern Logo
16:25 - 17:30CNX-LHR
32h 05m2 stops
£538China Eastern
Find Deal
Sat, 22 Nov - Sat, 29 Nov

China Southern flights from London Heathrow Airport to Chiang Mai

Our best China Southern deals on London Heathrow Airport to Chiang Mai flight tickets
China Southern
16 Nov
LHR22:00London Heathrow
36h 50m
1 stop
CNX17:50Chiang Mai
30 Nov
CNX18:50Chiang Mai
30h 45m
2 stops
LHR18:35London Heathrow
£503
Find similar
China Southern
18 Nov
LHR22:00London Heathrow
36h 50m
1 stop
CNX17:50Chiang Mai
14 Dec
CNX18:50Chiang Mai
30h 45m
2 stops
LHR18:35London Heathrow
£507
Find similar
China Southern
29 Nov
LHR21:30London Heathrow
37h 20m
2 stops
CNX17:50Chiang Mai
7 Dec
CNX18:50Chiang Mai
30h 45m
1 stop
LHR18:35London Heathrow
£517
Find similar

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
13 Nov
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
24 Nov
CNX16:25Chiang Mai
32h 05m
2 stops
LHR17:30London Heathrow
£532
Find similar
China Eastern
22 Nov
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
29 Nov
CNX16:25Chiang Mai
32h 05m
2 stops
LHR17:30London Heathrow
£538
Find similar
China Eastern
5 Nov
LHR21:00London Heathrow
34h 20m
1 stop
CNX14:20Chiang Mai
5 Dec
CNX16:25Chiang Mai
32h 05m
2 stops
LHR17:30London Heathrow
£538
Find similar

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 17 October 2025.
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

Thu 13/11

17:40-21:50

1 stop21h 10m

Chiang Mai

Mon 24/11

23:05-15:55

1 stop23h 50m

£486

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 19/11

17:40-21:50

1 stop21h 10m

Chiang Mai

Sun 23/11

23:05-17:50

1 stop25h 45m

£488

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Thu 27/11

20:25-21:50

1 stop18h 25m

Chiang Mai

Fri 5/12

23:05-15:55

1 stop23h 50m

£490

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 6/1

17:40-21:50

1 stop21h 10m

Chiang Mai

Thu 22/1

23:05-15:55

1 stop23h 50m

£491

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Fri 14/11

21:50-08:00

2 stops27h 10m

Chiang Mai

Fri 21/11

21:45-19:00

2 stops28h 15m

£495

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sun 16/11

22:00-17:50

1 stop36h 50m

Chiang Mai

Sun 30/11

18:50-18:35

2 stops30h 45m

£503

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 18/11

22:00-17:50

1 stop36h 50m

Chiang Mai

Sun 14/12

18:50-18:35

2 stops30h 45m

£507

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Thu 13/11

21:00-09:05

2 stops29h 05m

Chiang Mai

Thu 20/11

08:50-18:10

1 stop16h 20m

£512

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Thu 13/11

21:00-14:20

1 stop34h 20m

Chiang Mai

Mon 24/11

16:25-17:30

2 stops32h 05m

£532

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sat 22/11

21:00-14:20

1 stop34h 20m

Chiang Mai

Sat 29/11

16:25-17:30

2 stops32h 05m

£538

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

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 £695. 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 £702.

What is the cheapest day to depart on your flight to Chiang Mai?

The cheapest day to depart on your flight to Chiang Mai is on a Thursday when prices can be found for as low as £651. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £774.

What is the cheapest time of day to depart on your flight to Chiang Mai?

The cheapest time of day to fly to Chiang Mai is in the afternoon when flights can be purchased for as low as £568. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £948 on average. Flights to Chiang Mai from London Heathrow Airport at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 £766 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.

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

You could potentially save up to 31% 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 October 2025, prices for London Heathrow Airport to Chiang Mai flights are approximately 26% 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

Direct flights

None
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.
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  • 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 16h 15m.

  • 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 SouthernPriceFrom £423Free CancellationRating
7.4
116 reviews
Search China Southern flights
China EasternPriceFrom £455Free CancellationRating
7.2
172 reviews
Search China Eastern flights
Air ChinaPriceFrom £456Free CancellationRating
7.2
114 reviews
Search Air China flights
Etihad AirwaysPriceFrom £539Free CancellationRating
7.4
1,281 reviews
Search Etihad Airways flights
Malaysia AirlinesPriceFrom £553Free CancellationRating
7.3
278 reviews
Search Malaysia Airlines flights
EVA AirPriceFrom £602Free CancellationRating
8.4
1,253 reviews
Search EVA Air flights
Austrian AirlinesPriceFrom £611Free CancellationRating
7.6
856 reviews
Search Austrian Airlines flights
Cathay PacificPriceFrom £680Free CancellationRating
7.6
1,028 reviews
Search Cathay Pacific flights
Thai AirwaysPriceFrom £697Free CancellationRating
7.8
359 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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