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Cheap flights from London Heathrow Airport to Chiang Mai from £312

LHR — CNX
24 Oct — 31 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Chiang Mai

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Chiang Mai

Tue 10/1117:45 -
1 stop21h 05m
Mon 30/1123:05 -
1 stop25h 45m
Deal found 20/9£391
Tue 1/1220:25 -
1 stop18h 25m
Mon 21/1223:05 -
1 stop23h 50m
Deal found 19/9£395
Wed 25/1117:45 -
1 stop21h 05m
Tue 8/1223:05 -
1 stop23h 50m
Deal found 20/9£398
Mon 2/1117:45 -
1 stop21h 05m
Mon 16/1123:05 -
1 stop25h 45m
Deal found 20/9£403
Sun 1/1120:25 -
1 stop18h 25m
Sun 15/1123:05 -
1 stop23h 50m
Deal found 20/9£411
Wed 21/1022:40 -
1 stop17h 10m
Wed 28/1023:05 -
1 stop23h 50m
Deal found 20/9£441
Sat 31/1017:45 -
1 stop21h 05m
Fri 11/1223:05 -
1 stop25h 45m
Deal found 22/9£444
Mon 19/1022:40 -
1 stop17h 10m
Tue 3/1123:05 -
1 stop23h 50m
Deal found 23/9£444
Thu 26/1117:45 -
1 stop21h 05m
Thu 17/1223:05 -
1 stop23h 50m
Deal found 22/9£445
Tue 1/1221:00 -
2 stops35h 25m
Mon 21/1215:35 -
1 stop32h 55m
Deal found 20/9£449

Find flight deals from Heathrow to Chiang Mai

Round-trip from

£391

One-way from

£312

Popular in

July

Cheapest in

November

Average price

£676
Air China
  • Air China
  • 10/11-30/11
  • 2 total stops
  • 46h 50m total
  • London to Chiang Mai
Search Deals
China Eastern
  • China Eastern
  • 5/11-31/12
  • 1 total stop
  • 34h 20m total
  • London to Chiang Mai
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£99 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights 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

Wed 4/11

21:00-14:20

1 stop34h 20m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£318

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Fri 27/11

21:00-08:35

2 stops28h 35m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£321

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Mon 7/12

21:10-07:20

2 stops27h 10m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£348

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Sun 25/10

21:00-12:00

2 stops32h 00m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£364

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 7/10

15:50-22:00

3 stops24h 10m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£378

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 7/10

21:45-09:20

2 stops29h 35m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£391

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Wed 30/9

09:30-19:10

2 stops27h 40m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£401
Fastest return journey

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Sun 27/9

22:40-21:50

1 stop17h 10m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£432

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Thu 5/11

21:00-12:00

2 stops32h 00m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£471

LondonChiang Mai

LHR London Heathrow - CNX Chiang Mai

LHRCNX

London Heathrow

Sun 18/10

22:00-13:25

3 stops33h 25m

Chiang Mai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£480

Flights are sorted by cheapest return flights first.

Deals found on 21/9

Showing 1-10 of 21 resultsSorted by cheapest first
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2
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Best time to book a flight from Heathrow to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Heathrow with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Chiang Mai

How far ahead should I book a flight from London Heathrow Airport to Chiang Mai?

The price you pay for your flight from London Heathrow Airport to Chiang Mai may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Chiang Mai?

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Chiang Mai (average of £560). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £1,169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from London Heathrow Airport to Chiang Mai?

Airfare is below average for this route at the moment.

London Heathrow Airport to Chiang Mai flights typically cost between £623 and £824 in November.
The cheapest return price found within the last 5 days was £391 on Air China (10 Nov–30 Nov).

Reviews of airlines servicing Chiang Mai

Get a feel of what it's like to fly with Thai Airways,Austrian Airlines, andAir China from London Heathrow Airport to Chiang Mai by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Thai Airways
7.9
Good
423 reviews
Check prices

Food

7.5

Overall

7.9

Crew

8.5

Comfort

7.7

Boarding

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Thai Airways
7.9
Good
423 reviews
Thai Airways
7.9
Good
423 reviews
Check prices

Food

7.5

Overall

7.9

Crew

8.5

Comfort

7.7

Boarding

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Austrian Airlines
7.5
Good
971 reviews
Thai Airways
7.9
Good
423 reviews
Check prices

Food

7.5

Overall

7.9

Crew

8.5

Comfort

7.7

Boarding

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Air China
7.5
Good
166 reviews
Thai Airways
7.9
Good
423 reviews
Check prices

Food

7.5

Overall

7.9

Crew

8.5

Comfort

7.7

Boarding

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Etihad Airways
7.3
Good
1,535 reviews
Thai Airways
7.9
Good
423 reviews
Check prices

Food

7.5

Overall

7.9

Crew

8.5

Comfort

7.7

Boarding

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
China Eastern
7.3
Good
243 reviews
Thai Airways
7.9
Good
423 reviews
Check prices

Food

7.5

Overall

7.9

Crew

8.5

Comfort

7.7

Boarding

8.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing

Related info for your journey

  • What airport do you fly into for flights to Chiang Mai from London Heathrow?

    For a flight from London Heathrow to Chiang Mai, you will be flying into Chiang Mai. Chiang Mai (CNX) is just 1.9 mi from the center of the city. Chiang Mai is the only Chiang Mai airport and it handles 0 inbound flights from London Heathrow per day. 7 airlines have flights to Chiang Mai from London Heathrow on a regular basis.

  • How long is the flight from London Heathrow Airport to Chiang Mai?

    Departing from London Heathrow Airport to Chiang Mai will take you 20h 50m. There are 5598 mi between London Heathrow Airport and Chiang Mai. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Chiang Mai round-trip?

    Flying on China Eastern is currently your cheapest option to Chiang Mai, with prices starting at £382. Additional return tickets that might be worth considering are offered by Air China and Malaysia Airlines, with the lowest prices starting at £398 and £515, respectively. Users have found that China Eastern is 50% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from London Heathrow Airport to Chiang Mai one-way?

    £281 is the cheapest one-way deal found within the past few days, from China Eastern. You may also be able to find cheap deals on Air China and Etihad Airways, with prices starting from £283 and £344, respectively.

  • Can I find deals for flights from Heathrow to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Heathrow to Chiang Mai flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Chiang Mai.

  • Can I find deals for business class flights from Heathrow to Chiang Mai?

    Yes. Cheapflights offers flight deals from Heathrow to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Chiang Mai?

    Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Chiang Mai (average of £560). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £1,169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Heathrow to Chiang Mai

AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest£382Average£480FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Air ChinaCheapest£398Average£506FlexibilityNo cancel feeOn-time67%
Search Air China flights
Malaysia AirlinesCheapest£515Average£627FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
Etihad AirwaysCheapest£538Average£670FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Austrian AirlinesCheapest£566Average£665FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
Cathay PacificCheapest£696Average£804FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
Thai AirwaysCheapest£794Average£968FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Chiang Mai?

Cheapflights helps you search for flights from Heathrow to Chiang Mai via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Chiang Mai?

Cheapflights helps you find that perfect flight to Chiang Mai from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Chiang Mai with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Chiang Mai, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Chiang Mai become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Chiang Mai flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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