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Cheap flights from Chiang Mai to London Heathrow Airport from ฿10,137

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
23 Jul — 30 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 18 July 2025.

Round-trip from

฿28,234

One-way from

฿10,137

Popular in

April

Cheapest in

February

Average price

฿31,938
7/9-28/9
  • 7/9-28/9
  • 4 total stops
  • 61h 45m total
  • Chiang Mai to London
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 39h 35m total
  • Chiang Mai to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (฿152,348 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿27,584 potential savings vs. average return price).
Search Deals
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 18 July 2025.

Sun 7/908:00CNX - LHR
2 stops38h 00mMultiple Airlines
Sun 28/914:40LHR - CNX
2 stops23h 45mMultiple Airlines
Deal found 17/7฿28,234
Fri 12/918:50CNX - LHR
1 stop30h 10mChina Southern
Mon 22/922:10LHR - CNX
1 stop37h 40mChina Southern
Deal found 17/7฿30,671
Mon 15/1208:50CNX - LHR
1 stop16h 35mเอทิฮัดแอร์เวย์
Fri 2/109:00LHR - CNX
1 stop14h 05mเอทิฮัดแอร์เวย์
Deal found 17/7฿31,483
Sat 13/1223:05CNX - LHR
1 stop25h 45mAir China
Sun 4/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 17/7฿32,263
Sat 13/920:00CNX - LHR
2 stops22h 25mEmirates
Fri 19/916:50LHR - CNX
2 stops20h 20mEmirates
Deal found 17/7฿32,945
Tue 9/914:40CNX - LHR
1 stop31h 55mMalaysia Airlines
Wed 1/1021:35LHR - CNX
1 stop32h 05mMalaysia Airlines
Deal found 17/7฿33,140
Sat 16/814:55CNX - LHR
1 stop33h 45mChina Eastern
Sat 23/821:20LHR - CNX
3 stops29h 45mChina Eastern
Deal found 17/7฿33,498
Wed 3/900:45CNX - LHR
1 stop24h 05mAsiana Airlines
Fri 26/920:40LHR - CNX
1 stop21h 00mAsiana Airlines
Deal found 17/7฿33,693
Sun 7/912:20CNX - LHR
1 stop36h 55mThai Airways
Sun 28/912:30LHR - CNX
1 stop17h 10mThai Airways
Deal found 17/7฿34,310
Fri 12/914:35CNX - LHR
2 stops30h 45mกัลฟ์แอร์
Mon 22/910:00LHR - CNX
2 stops21h 45mกัลฟ์แอร์
Deal found 16/7฿34,830
Sun 7/911:20CNX - LHR
1 stop35h 10mChina Airlines
Mon 29/921:10LHR - CNX
1 stop31h 10mChina Airlines
Deal found 17/7฿35,252
Wed 10/911:55CNX - LHR
1 stop37h 25mEVA Air
Sat 27/921:35LHR - CNX
1 stop15h 35mEVA Air
Deal found 17/7฿37,689

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 17,341 searches. Data last updated 18 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

Sun 7/9

08:00-16:00

2 stops38h 00m

London Heathrow

Sun 28/9

14:40-20:25

2 stops23h 45m

฿28,234

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 12/9

18:50-19:00

1 stop30h 10m

London Heathrow

Mon 22/9

22:10-17:50

1 stop37h 40m

฿30,671

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 15/12

08:50-18:25

1 stop16h 35m

London Heathrow

Fri 2/1

09:00-06:05

1 stop14h 05m

฿31,483

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 13/12

23:05-17:50

1 stop25h 45m

London Heathrow

Sun 4/1

17:40-21:50

1 stop21h 10m

฿32,263

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 13/9

20:00-12:25

2 stops22h 25m

London Heathrow

Fri 19/9

16:50-19:10

2 stops20h 20m

฿32,945

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 9/9

14:40-16:35

1 stop31h 55m

London Heathrow

Wed 1/10

21:35-11:40

1 stop32h 05m

฿33,140

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 16/8

14:55-18:40

1 stop33h 45m

London Heathrow

Sat 23/8

21:20-09:05

3 stops29h 45m

฿33,498

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 3/9

00:45-18:50

1 stop24h 05m

London Heathrow

Thu 25/9

20:40-23:40

1 stop21h 00m

฿33,693

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sun 7/9

12:20-19:15

1 stop36h 55m

London Heathrow

Sun 28/9

12:30-11:40

1 stop17h 10m

฿34,310

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 12/9

14:35-15:20

2 stops30h 45m

London Heathrow

Mon 22/9

10:00-13:45

2 stops21h 45m

฿34,830

Flights are sorted by cheapest return flights first.

Deals found on 17/7

Showing 1-10 of 20 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 is the cheapest time of day to fly from CNX to LHR?

Find hourly flight availability from Chiang Mai to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 July 2025.

It’s typically best to fly out from Chiang Mai to London Heathrow Airport at midday. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

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 2025.
Read reviews from past customers who have flown with EVA Air, China Airlines, andAsiana Airlines from Chiang Mai to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,214 reviews
Check prices

Crew

8.6

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

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
1,214 reviews
EVA Air
8.4
Very Good
1,214 reviews
Check prices

Crew

8.6

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

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
8.2
Very Good
745 reviews
EVA Air
8.4
Very Good
1,214 reviews
Check prices

Crew

8.6

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

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
456 reviews
EVA Air
8.4
Very Good
1,214 reviews
Check prices

Crew

8.6

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

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
Emirates
8.1
Very Good
3,288 reviews
EVA Air
8.4
Very Good
1,214 reviews
Check prices

Crew

8.6

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

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
7.8
Good
339 reviews
EVA Air
8.4
Very Good
1,214 reviews
Check prices

Crew

8.6

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

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?

    For a flight from Chiang Mai to London Heathrow, you will be flying from Chiang Mai. Chiang Mai (CNX) is just 3.1 km from the centre of the city. Chiang Mai is the only Chiang Mai airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Chiang Mai on a regular basis.

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

    Currently priced at ฿30,671, China Southern will fly you from Chiang Mai to London Heathrow Airport and back. In addition to China Southern, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from เอทิฮัดแอร์เวย์ and Air China - these airlines can fly you to your destination from ฿31,483 and ฿32,263, respectively.

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

    For one-way options, check prices for Air China. According to our data, you can fly for as low as ฿12,574. Users have also found prices from ฿14,653 and ฿20,469 on Thai Airways and Emirates, respectively.

  • 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, December is the cheapest month in which you can book a flight from Chiang Mai to London Heathrow Airport (average of ฿810). Flying from Chiang Mai to London Heathrow Airport in July is currently the most expensive (average of ฿1,025). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Brentford
Waterlooville

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

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

Need flexible booking options for your flight to Heathrow from Chiang Mai? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from Chiang Mai today and book when prices fit your budget.

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