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Cheap flights from Chiang Mai to London Heathrow Airport from £278

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
17 Aug — 24 Aug1
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 18 July 2026.

Wed 19/814:30
CNX
-
LHR
2 stops35h 45m
Multiple Airlines
Sun 23/820:25
LHR
-
CNX
1 stop19h 25m
Multiple Airlines
Deal found 17/7£586
Tue 28/700:30
CNX
-
LHR
1 stop24h 10m
Multiple Airlines
Fri 28/822:40
LHR
-
CNX
1 stop17h 10m
Multiple Airlines
Deal found 16/7£590
Wed 12/815:45
CNX
-
LHR
2 stops32h 00m
Multiple Airlines
Mon 31/822:40
LHR
-
CNX
1 stop17h 10m
Multiple Airlines
Deal found 17/7£595
Tue 28/700:30
CNX
-
LHR
1 stop24h 10m
Multiple Airlines
Fri 21/822:40
LHR
-
CNX
1 stop17h 10m
Multiple Airlines
Deal found 14/7£598
Fri 25/1209:10
CNX
-
LHR
1 stop16h 00m
Multiple Airlines
Sun 10/117:40
LHR
-
CNX
1 stop21h 10m
Multiple Airlines
Deal found 18/7£639

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 18 July 2026.

Round-trip from

£586

One-way from

£278
Air China
  • Air China
  • 19/8-23/8
  • 3 total stops
  • 55h 10m total
  • Chiang Mai to London
Search Deals
Etihad Airways
  • Etihad Airways
  • 16/9
  • 2 total stops
  • 26h 50m total
  • Chiang Mai to London
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 18 July 2026.
Use the filters below to find and compare flights from Chiang Mai to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 19/8

14:30-20:15

2 stops35h 45m

London Heathrow

Sun 23/8

20:25-21:50

1 stop19h 25m

£586
Fastest return journey

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 28/7

00:30-18:40

1 stop24h 10m

London Heathrow

Fri 21/8

22:40-21:50

1 stop17h 10m

£598

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 11/8

00:30-18:40

1 stop24h 10m

London Heathrow

Mon 31/8

20:25-21:50

1 stop19h 25m

£692

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 29/7

21:15-20:25

2 stops29h 10m

London Heathrow

Fri 28/8

14:45-19:10

2 stops22h 25m

£714

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 14/9

11:55-07:00

2 stops25h 05m

London Heathrow

Wed 16/9

14:45-19:10

2 stops22h 25m

£728

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 9/10

12:10-19:30

1 stop37h 20m

London Heathrow

Fri 16/10

12:35-11:15

2 stops40h 40m

£738

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 9/10

10:10-06:30

2 stops26h 20m

London Heathrow

Fri 16/10

08:25-11:40

2 stops45h 15m

£765

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 14/9

23:05-20:25

1 stop27h 20m

London Heathrow

Wed 16/9

20:25-21:50

1 stop19h 25m

£818

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 28/8

11:55-07:30

2 stops25h 35m

London Heathrow

Fri 4/9

20:25-21:50

1 stop19h 25m

£825
Cheapest one-way

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 16/9

10:10-07:00

2 stops26h 50m

£278

Flights are sorted by cheapest return flights first.

Deals found on 14/7

Showing 1-10 of 20 resultsSorted by cheapest first
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.

Kuala Lumpur (KUL) is the most affordable one-stop option, with an average return flight price of £615.

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 16m.

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 Bangkok (BKK) offer the fastest connection on this route, with an average stopover time of 2h 03m.

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 18 July 2026.
See what other customers who have flown with Air China and Etihad Airways 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.
Air China
7.4
Good
156 reviews
Check prices

Crew

8.0

Entertainment

6.5

Overall

7.4

Boarding

7.8

Comfort

7.2

Food

7.2

Reviews

1 / 7
2.0
Mediocre

guoliang,May 2026

PEK - LAX

Kayak does not have service in china thus no reminder email or even access to the kayak account to see the itinerary.. missed the flight.. also air china app requires a local phone number to register.. yep.. they consider themself international airliner but does not allow anyone outside china to use the app.
Air China
7.4
Good
156 reviews
Air China
7.4
Good
156 reviews
Check prices

Crew

8.0

Entertainment

6.5

Overall

7.4

Boarding

7.8

Comfort

7.2

Food

7.2

Reviews

1 / 7
2.0
Mediocre

guoliang,May 2026

PEK - LAX

Kayak does not have service in china thus no reminder email or even access to the kayak account to see the itinerary.. missed the flight.. also air china app requires a local phone number to register.. yep.. they consider themself international airliner but does not allow anyone outside china to use the app.
Etihad Airways
7.3
Good
1,479 reviews
Air China
7.4
Good
156 reviews
Check prices

Crew

8.0

Entertainment

6.5

Overall

7.4

Boarding

7.8

Comfort

7.2

Food

7.2

Reviews

1 / 7
2.0
Mediocre

guoliang,May 2026

PEK - LAX

Kayak does not have service in china thus no reminder email or even access to the kayak account to see the itinerary.. missed the flight.. also air china app requires a local phone number to register.. yep.. they consider themself international airliner but does not allow anyone outside china to use the app.

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.

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

    Currently priced at £510, 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 Etihad Airways for as low as £565.

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

    The cheapest airline one-way is Etihad Airways, with whom users have recently found tickets for as low as £199. However, be on the lookout for offers from Air China and Thai Airways, as they are both options that can get you from Chiang Mai to London Heathrow Airport for a low price.

  • 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Northampton
Watford
Eastbourne
Swindon
Southend-on-Sea
Poole
Kingston upon Thames
Southall
Aylesbury

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 18 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest£510Average£548FlexibilityNo cancel feeOn-time67%
Search Air China flights
Etihad AirwaysCheapest£565Average£661FlexibilityNo cancel feeOn-time75%
Search Etihad 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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