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Cheap flights from Chiang Mai to London Heathrow Airport from £218

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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
6 Jul — 13 Jul1
1 adult

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 1 July 2025.

Round-trip from

£645

One-way from

£218

Popular in

April

Cheapest in

February

Average price

£686
Air China
  • Air China
  • 14/7-3/8
  • 2 total stops
  • 46h 50m total
  • Chiang Mai to London
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7/7
  • 7/7
  • 3 total stops
  • 50h 50m total
  • Chiang Mai to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£77 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£14 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Find flight deals from Chiang Mai to Heathrow

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 1 July 2025.

Mon 14/723:05CNX - LHR
1 stop27h 25mAir China
Sun 3/820:25LHR - CNX
1 stop19h 25mAir China
Deal found 1/7£645
Fri 26/1219:45CNX - LHR
2 stops19h 20mLufthansa
Thu 15/117:50LHR - CNX
2 stops18h 10mLufthansa
Deal found 30/6£709
Fri 12/914:55CNX - LHR
1 stop33h 45mChina Eastern
Mon 22/921:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 30/6£725
Thu 11/900:45CNX - LHR
1 stop24h 05mAsiana Airlines
Mon 22/920:40LHR - CNX
1 stop21h 00mAsiana Airlines
Deal found 1/7£730
Mon 14/715:45CNX - LHR
2 stops24h 30mMultiple Airlines
Sun 3/822:10LHR - CNX
3 stops28h 30mMultiple Airlines
Deal found 1/7£741
Sat 20/1208:50CNX - LHR
2 stops54h 35mEtihad Airways
Sat 3/120:55LHR - CNX
1 stop26h 10mEtihad Airways
Deal found 1/7£763
Fri 12/911:20CNX - LHR
1 stop35h 10mChina Airlines
Mon 22/921:10LHR - CNX
1 stop31h 10mChina Airlines
Deal found 1/7£776
Thu 4/914:40CNX - LHR
1 stop31h 55mMalaysia Airlines
Wed 17/911:00LHR - CNX
1 stop20h 40mMalaysia Airlines
Deal found 30/6£789
Sat 13/920:00CNX - LHR
1 stop29h 20mEVA Air
Fri 19/921:35LHR - CNX
1 stop15h 35mEVA Air
Deal found 1/7£813
Thu 4/915:30CNX - LHR
1 stop21h 45mThai Airways
Tue 16/912:30LHR - CNX
1 stop14h 15mThai Airways
Deal found 1/7£820
Thu 4/910:10CNX - LHR
2 stops35h 10mGulf Air
Tue 16/910:00LHR - CNX
2 stops21h 45mGulf Air
Deal found 30/6£828

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 1 July 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

Mon 14/7

23:05-20:30

1 stop27h 25m

London Heathrow

Sun 3/8

20:25-21:50

1 stop19h 25m

£645

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 26/12

19:45-08:05

2 stops19h 20m

London Heathrow

Thu 15/1

17:50-19:00

2 stops18h 10m

£709

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 12/9

14:55-18:40

1 stop33h 45m

London Heathrow

Mon 22/9

21:20-13:25

1 stop34h 05m

£725

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 11/9

00:45-18:50

1 stop24h 05m

London Heathrow

Mon 22/9

20:40-23:40

1 stop21h 00m

£730

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 14/7

15:45-10:15

2 stops24h 30m

London Heathrow

Sun 3/8

22:10-08:40

3 stops28h 30m

£741

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 20/12

08:50-08:25

2 stops54h 35m

London Heathrow

Sat 3/1

20:55-06:05

1 stop26h 10m

£763

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 12/9

11:20-16:30

1 stop35h 10m

London Heathrow

Mon 22/9

21:10-10:20

1 stop31h 10m

£776

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 4/9

14:40-16:35

1 stop31h 55m

London Heathrow

Wed 17/9

11:00-13:40

1 stop20h 40m

£789

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 13/9

20:00-19:20

1 stop29h 20m

London Heathrow

Fri 19/9

21:35-19:10

1 stop15h 35m

£813

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 4/9

15:30-07:15

1 stop21h 45m

London Heathrow

Tue 16/9

12:30-08:45

1 stop14h 15m

£820

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 16 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.

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 1 July 2025.
See what other customers who have flown with EVA Air, China Airlines, andAsiana Airlines 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.
EVA Air
8.4
Very Good
1,212 reviews
Check prices

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very Good
1,212 reviews
EVA Air
8.4
Very Good
1,212 reviews
Check prices

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very Good
747 reviews
EVA Air
8.4
Very Good
1,212 reviews
Check prices

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Asiana Airlines
8.2
Very Good
450 reviews
EVA Air
8.4
Very Good
1,212 reviews
Check prices

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Thai Airways
7.7
Good
338 reviews
EVA Air
8.4
Very Good
1,212 reviews
Check prices

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Etihad Airways
7.4
Good
1,224 reviews
EVA Air
8.4
Very Good
1,212 reviews
Check prices

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 1 airline.

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

    Currently priced at £645, 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. Search Cheapflights for deals from Lufthansa and China Eastern - these airlines can fly you to your destination from £709 and £725, respectively.

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

    The cheapest airline one-way is Air China, with whom users have recently found tickets for as low as £281. However, be on the lookout for offers from Thai Airways and China Airlines, 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.

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

    Currently, January is the cheapest month in which you can book a flight from Chiang Mai to London Heathrow Airport (average of £112). Flying from Chiang Mai to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near Chiang Mai?

Book flights to Chiang Mai if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Northampton
Gatwick
Luton
Slough
Wembley
Crawley
Eastbourne
Ilford
Hayes
Folkestone
Southend-on-Sea
Watford
Ipswich
Winchester
Swindon
Maidstone

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 airline flying from Chiang Mai to Heathrow

Discover the top airline 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 1 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£757Average£990FlexibilityNo 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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