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Cheap flights from Chiang Mai to London Heathrow Airport from £255

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
17 May — 24 May1
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 17 April 2026.

Tue 8/911:55
CNX
-
LHR
2 stops33h 25m
Multiple Airlines
Mon 21/922:40
LHR
-
CNX
1 stop17h 10m
Multiple Airlines
Deal found 14/4£658
Sun 10/513:40
CNX
-
LHR
2 stops35h 50m
Multiple Airlines
Sat 13/610:00
LHR
-
CNX
2 stops31h 25m
Multiple Airlines
Deal found 16/4£692
Tue 12/523:05
CNX
-
LHR
1 stop24h 35m
Multiple Airlines
Tue 19/516:00
LHR
-
CNX
2 stops18h 15m
Multiple Airlines
Deal found 14/4£735
Sun 10/511:55
CNX
-
LHR
2 stops25h 00m
Gulf Air
Sun 17/510:00
LHR
-
CNX
2 stops21h 45m
Gulf Air
Deal found 12/4£756
Tue 8/914:40
CNX
-
LHR
1 stop21h 15m
Multiple Airlines
Wed 23/922:40
LHR
-
CNX
1 stop17h 10m
Multiple Airlines
Deal found 14/4£771
Mon 7/912:35
CNX
-
LHR
2 stops36h 35m
Oman Air
Fri 25/920:50
LHR
-
CNX
2 stops32h 50m
Oman Air
Deal found 14/4£776
Fri 15/514:35
CNX
-
LHR
2 stops30h 45m
Gulf Air
Sun 31/510:00
LHR
-
CNX
2 stops21h 45m
Gulf Air
Deal found 13/4£780
Mon 22/610:10
CNX
-
LHR
2 stops26h 45m
Gulf Air
Tue 23/622:05
LHR
-
CNX
2 stops33h 40m
Gulf Air
Deal found 13/4£781
Tue 15/1210:10
CNX
-
LHR
2 stops32h 20m
Multiple Airlines
Tue 29/1208:45
LHR
-
CNX
2 stops19h 35m
Multiple Airlines
Deal found 14/4£788
Fri 15/512:35
CNX
-
LHR
2 stops23h 55m
Oman Air
Sun 31/508:25
LHR
-
CNX
2 stops21h 15m
Oman Air
Deal found 14/4£793

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 17 April 2026.

Round-trip from

£658

One-way from

£255
Air China
  • Air China
  • 8/9-21/9
  • 3 total stops
  • 50h 35m total
  • Chiang Mai to London
Search Deals
16/5
  • 16/5
  • 3 total stops
  • 51h 00m 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 17 April 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

Sun 10/5

13:40-19:30

2 stops35h 50m

London Heathrow

Sat 13/6

19:55-12:30

3 stops34h 35m

£737

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 10/5

11:55-06:55

2 stops25h 00m

London Heathrow

Sun 17/5

10:00-13:45

2 stops21h 45m

£756

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 15/5

12:35-06:30

2 stops23h 55m

London Heathrow

Sun 31/5

08:25-11:40

2 stops21h 15m

£793

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 17/5

10:10-15:20

2 stops35h 10m

London Heathrow

Tue 19/5

10:00-13:45

2 stops21h 45m

£799

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 20/6

11:55-06:55

2 stops25h 00m

London Heathrow

Wed 24/6

10:00-13:45

2 stops21h 45m

£818

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 2/6

20:00-12:25

2 stops22h 25m

London Heathrow

Sat 6/6

09:05-19:10

2 stops28h 05m

£819
Fastest return journey

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 7/5

20:00-12:25

2 stops22h 25m

London Heathrow

Thu 21/5

16:50-19:10

2 stops20h 20m

£821

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 15/5

20:00-12:25

2 stops22h 25m

London Heathrow

Sun 31/5

16:50-19:10

2 stops20h 20m

£824

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 17/5

14:55-18:40

1 stop33h 45m

London Heathrow

Tue 19/5

21:20-13:25

1 stop34h 05m

£841
Cheapest one-way

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 21/5

14:10-19:30

3 stops35h 20m

£263

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 16 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 52% 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 £611.

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 18m.

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 17 April 2026.
See what other customers who have flown with Etihad 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.
Etihad Airways
7.3
Good
1,432 reviews
Check prices

Crew

7.8

Comfort

7.3

Entertainment

7.2

Food

7.2

Overall

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Gwendolyn,Mar 2026

AUH - ATL

Flight was very cold. Everyone was using blankets. New plane did not allow passenger ability to shut off AC at their seat. Special assistance was wonderful.
Etihad Airways
7.3
Good
1,432 reviews
Etihad Airways
7.3
Good
1,432 reviews
Check prices

Crew

7.8

Comfort

7.3

Entertainment

7.2

Food

7.2

Overall

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Gwendolyn,Mar 2026

AUH - ATL

Flight was very cold. Everyone was using blankets. New plane did not allow passenger ability to shut off AC at their seat. Special assistance was wonderful.
Air China
7.3
Good
146 reviews
Etihad Airways
7.3
Good
1,432 reviews
Check prices

Crew

7.8

Comfort

7.3

Entertainment

7.2

Food

7.2

Overall

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Gwendolyn,Mar 2026

AUH - ATL

Flight was very cold. Everyone was using blankets. New plane did not allow passenger ability to shut off AC at their seat. Special assistance was wonderful.

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?

    Gulf Air and Oman Air can get you from Chiang Mai to London Heathrow Airport in just under 23h 55m. Your travel time can differ by up to 1h 05m. 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 £507, 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 £561.

  • 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 £189. 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
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Chelmsford
Ipswich
Southend-on-Sea

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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest£507Average£544FlexibilityNo cancel feeOn-time67%
Search Air China flights
Etihad AirwaysCheapest£561Average£656FlexibilityNo 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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