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Cheap flights from Chiang Mai to London Heathrow Airport from £192

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 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 6 November 2025.

Round-trip from

£549

One-way from

£192

Popular in

June

Cheapest in

December

Average price

£718
21/3-5/4
  • 21/3-5/4
  • 5 total stops
  • 61h 20m total
  • Chiang Mai to London
Search Deals
Etihad Airways
  • Etihad Airways
  • 20/11
  • 1 total stop
  • 16h 20m total
  • Chiang Mai to London
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£81 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find 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 6 November 2025.

Thu 11/1216:25CNX - LHR
2 stops32h 05mChina Eastern
Thu 15/121:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 5/11£437
Sun 16/1123:05CNX - LHR
1 stop25h 45mAir China
Sun 30/1120:25LHR - CNX
1 stop18h 25mAir China
Deal found 4/11£556
Wed 5/1118:10CNX - LHR
1 stop28h 45mAir China
Tue 11/1120:25LHR - CNX
1 stop18h 25mAir China
Deal found 4/11£561
Wed 5/1115:35CNX - LHR
1 stop32h 55mChina Eastern
Wed 12/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 4/11£562
Wed 5/1118:10CNX - LHR
1 stop28h 45mAir China
Wed 12/1120:25LHR - CNX
1 stop18h 25mAir China
Deal found 4/11£572
Thu 11/1223:05CNX - LHR
1 stop23h 50mAir China
Thu 15/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 5/11£573
Thu 11/1218:50CNX - LHR
1 stop30h 45mChina Southern
Thu 15/121:30LHR - CNX
2 stops37h 20mChina Southern
Deal found 5/11£588
Wed 5/1115:35CNX - LHR
1 stop32h 55mChina Eastern
Tue 11/1121:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 4/11£601
Thu 6/1115:35CNX - LHR
1 stop32h 55mChina Eastern
Thu 20/1121:00LHR - CNX
1 stop34h 20mChina Eastern
Deal found 5/11£658

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 6 November 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

Sat 21/3

22:30-19:20

2 stops27h 50m

London Heathrow

Sun 5/4

06:40-13:40

2 stops25h 00m

£549

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 3/3

14:50-15:25

1 stop31h 35m

London Heathrow

Fri 13/3

10:25-13:50

1 stop20h 25m

£562

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 20/1

14:50-05:35

1 stop21h 45m

London Heathrow

Mon 2/2

21:25-11:25

1 stop31h 00m

£579

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 20/1

14:50-05:35

1 stop21h 45m

London Heathrow

Sat 31/1

21:25-11:25

1 stop31h 00m

£579

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

22:25-18:35

2 stops27h 10m

London Heathrow

Thu 19/3

10:35-16:50

2 stops23h 15m

£580

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

08:50-18:10

1 stop16h 20m

London Heathrow

Thu 19/3

19:20-06:05

1 stop27h 45m

£624

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

16:25-17:30

2 stops32h 05m

London Heathrow

Sun 8/3

21:00-14:20

1 stop34h 20m

£656

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 16/11

23:05-17:50

1 stop25h 45m

London Heathrow

Thu 4/12

17:40-21:50

1 stop21h 10m

£664

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 4/3

12:25-15:25

1 stop34h 00m

London Heathrow

Thu 19/3

20:55-06:05

1 stop26h 10m

£677

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

08:50-18:10

1 stop16h 20m

London Heathrow

Sat 7/3

13:55-06:05

1 stop33h 10m

£681

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 21 results
1
2
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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 63% of one-stop itineraries from Chiang Mai to London Heathrow Airport on Cheapflights.

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 Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 16h 35m.

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 Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 16h 35m.

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 23m.

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 6 November 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
361 reviews
Check prices

Boarding

7.8

Food

7.3

Comfort

7.6

Entertainment

6.9

Overall

7.8

Crew

8.3

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
361 reviews
Thai Airways
7.8
Good
361 reviews
Check prices

Boarding

7.8

Food

7.3

Comfort

7.6

Entertainment

6.9

Overall

7.8

Crew

8.3

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
7.1
Good
122 reviews
Thai Airways
7.8
Good
361 reviews
Check prices

Boarding

7.8

Food

7.3

Comfort

7.6

Entertainment

6.9

Overall

7.8

Crew

8.3

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?

    Malaysia Airlines can get you from Chiang Mai to London Heathrow Airport in just under 31h 35m. Your travel time can differ by up to . The distance from Chiang Mai to London Heathrow Airport is about 5598 mi.

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

    Currently priced at £527, 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 £908. Users have found that Air China is 38% 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
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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 6 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest£527Average£566FlexibilityNo cancel feeOn-time67%
Search Air China flights
Thai AirwaysCheapest£908Average£1,044FlexibilityNo 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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