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Cheap flights from Chiang Mai to London Heathrow Airport from £184

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Chiang Mai to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Chiang Mai to Heathrow
Explore the most affordable flight options available from Chiang Mai to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Thu 11/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Wed 7/121:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 5/12£453
Tue 23/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Thu 8/121:00LHR - CNX
2 stops35h 25mChina Eastern
Deal found 4/12£463
Tue 23/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Thu 8/121:00LHR - CNX
1 stop34h 20mMultiple Airlines
Deal found 4/12£486
Wed 24/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Sun 11/121:00LHR - CNX
1 stop34h 20mChina Eastern
Deal found 4/12£490
Tue 23/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Sat 10/121:00LHR - CNX
1 stop34h 20mMultiple Airlines
Deal found 4/12£522
Tue 23/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Mon 12/121:00LHR - CNX
1 stop34h 20mMultiple Airlines
Deal found 4/12£525
Thu 25/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Thu 8/121:00LHR - CNX
1 stop34h 20mMultiple Airlines
Deal found 4/12£531
Thu 25/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Mon 12/121:00LHR - CNX
2 stops29h 05mMultiple Airlines
Deal found 4/12£537
Tue 23/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Fri 9/121:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 4/12£570

Find flight deals from Chiang Mai to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Chiang Mai (CNX) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 5 December 2025.

Round-trip from

£463

One-way from

£184

Popular in

October

Cheapest in

December

Average price

£572
China Eastern
  • China Eastern
  • 23/12-8/1
  • 4 total stops
  • 67h 30m total
  • Chiang Mai to London
Search Deals
China Eastern
  • China Eastern
  • 12/12
  • 2 total stops
  • 32h 05m total
  • Chiang Mai to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£30 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Chiang Mai to Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 5 December 2025.
Use the filters below to find and compare flights from Chiang Mai to London Heathrow Airport that are best for you.

Fly from

Chiang Mai

Fly to

Heathrow

Route

Depart

Return

Price

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 25/12

08:50-18:10

1 stop16h 20m

London Heathrow

Mon 12/1

21:00-14:20

1 stop34h 20m

£531

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 19/1

21:45-17:30

2 stops26h 45m

London Heathrow

Mon 26/1

21:00-14:20

1 stop34h 20m

£573

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 14/5

23:05-17:45

1 stop24h 40m

London Heathrow

Mon 18/5

20:25-21:50

1 stop19h 25m

£629

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 19/1

15:35-20:50

2 stops36h 15m

London Heathrow

Mon 26/1

06:20-14:20

2 stops25h 00m

£651

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

19:40-15:00

1 stop26h 20m

London Heathrow

Mon 9/3

20:15-18:50

1 stop39h 35m

£679

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 3/5

18:50-18:05

2 stops29h 15m

London Heathrow

Sun 17/5

22:10-17:50

1 stop37h 40m

£710

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 2/5

08:45-07:00

1 stop28h 15m

London Heathrow

Fri 15/5

21:45-05:55

1 stop26h 10m

£719

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 3/5

08:45-18:45

1 stop16h 00m

London Heathrow

Sat 16/5

09:30-05:55

1 stop14h 25m

£719

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 3/5

08:45-18:45

1 stop16h 00m

London Heathrow

Wed 13/5

09:30-05:55

1 stop14h 25m

£719

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 2/5

08:45-07:00

1 stop28h 15m

London Heathrow

Sat 16/5

09:30-05:55

1 stop14h 25m

£719

Flights are sorted by cheapest return flights first.

Deals found on 5/12

Showing 1-10 of 19 results
1
2

Best time to book a flight from Chiang Mai to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Chiang Mai with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What’s the top stopover airport for flights from Chiang Mai to London Heathrow Airport?

Share of one-stop return flights from Chiang Mai to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Bangkok (BKK) – chosen by Cheapflights users on 55% of one-stop itineraries from Chiang Mai to London Heathrow Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Chiang Mai to London Heathrow Airport?

Average return fare for one-stop flights from Chiang Mai to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Guangzhou (CAN) is the most affordable one-stop option, with an average return flight price of £490.

What’s the fastest stopover option from Chiang Mai to London Heathrow Airport?

Shortest average travel time for one-stop one-way flights from Chiang Mai to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Abu Dhabi (AUH) have the shortest average one-way travel time for one-stop routes: 16h 21m.

Which airport typically offers the quickest stopover for flights from Chiang Mai to London Heathrow Airport?

Average stopover duration for one-stop one-way flights from Chiang Mai to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Abu Dhabi (AUH) offer the fastest connection on this route, with an average stopover time of 1h 22m.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 5 December 2025.
See what other customers who have flown with Thai Airways and Air China from Chiang Mai to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Thai Airways
7.8
Good
364 reviews
Check prices

Boarding

7.9

Entertainment

6.9

Food

7.3

Comfort

7.5

Crew

8.3

Overall

7.8

Reviews

1 / 18
10.0
Excellent

Joe,Jun 2025

BKK - TPE

The flight was very comfortable, and I really appreciated that each seat had an electric outlet to charge devices. The staff was great.
Thai Airways
7.8
Good
364 reviews
Thai Airways
7.8
Good
364 reviews
Check prices

Boarding

7.9

Entertainment

6.9

Food

7.3

Comfort

7.5

Crew

8.3

Overall

7.8

Reviews

1 / 18
10.0
Excellent

Joe,Jun 2025

BKK - TPE

The flight was very comfortable, and I really appreciated that each seat had an electric outlet to charge devices. The staff was great.
Air China
7.2
Good
127 reviews
Thai Airways
7.8
Good
364 reviews
Check prices

Boarding

7.9

Entertainment

6.9

Food

7.3

Comfort

7.5

Crew

8.3

Overall

7.8

Reviews

1 / 18
10.0
Excellent

Joe,Jun 2025

BKK - TPE

The flight was very comfortable, and I really appreciated that each seat had an electric outlet to charge devices. The staff was great.

Related info for your journey

Find useful and relevant information for your journey from Chiang Mai to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    If you book a flight to London Heathrow from Chiang Mai, you will be flying from Chiang Mai, which is the city’s only airport. Chiang Mai (CNX) is located 1.9 mi from the center of Chiang Mai. There are 0 flights from Chiang Mai to London Heathrow per day from 2 different airlines.

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

    Air China and China Eastern can get you from Chiang Mai to London Heathrow Airport in just under 24h 40m. Your travel time can differ by up to 11h 35m. The distance from Chiang Mai to London Heathrow Airport is about 5598 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Currently priced at £515, Air China will fly you from Chiang Mai to London Heathrow Airport and back. In addition to Air China, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Thai Airways for as low as £887. Users have found that Air China is 39% cheaper than the other options available to this destination.

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

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

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

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

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

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

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Northampton
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Swindon
Romford
Bedford
Chichester

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Chiang Mai to Heathrow

Discover the top 2 airlines that operate flights from Chiang Mai to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest£515Average£553FlexibilityNo cancel feeOn-time67%
Search Air China flights
Thai AirwaysCheapest£887Average£1,020FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Chiang Mai to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Chiang Mai to Heathrow.

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

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

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

Yes, Cheapflights offers price alerts on Chiang Mai to Heathrow 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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