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Cheap flights from Chiang Mai to London Heathrow Airport from ฿12,464

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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
11 Jul — 18 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 6 July 2025.

Round-trip from

฿27,898

One-way from

฿12,464

Popular in

April

Cheapest in

February

Average price

฿30,449
Air China
  • Air China
  • 20/12-3/1
  • 2 total stops
  • 44h 10m total
  • Chiang Mai to London
27/10
  • 27/10
  • 2 total stops
  • 29h 15m total
  • Chiang Mai to London
Highest demand for flights based on searches. 13% potential increase in price (฿151,999 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (฿27,366 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 6 July 2025.

Sat 20/1223:05CNX - LHR
1 stop25h 45mAir China
Sat 3/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 4/7฿27,898
Mon 18/816:20CNX - LHR
2 stops32h 20mChina Eastern
Mon 25/821:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 4/7฿29,318
Mon 29/906:30CNX - LHR
2 stops18h 15mMultiple Airlines
Mon 13/1009:30LHR - CNX
2 stops20h 35mMultiple Airlines
Deal found 5/7฿29,512
Mon 1/1218:50CNX - LHR
1 stop30h 25mChina Southern
Sun 21/1221:30LHR - CNX
2 stops37h 20mChina Southern
Deal found 4/7฿31,288
Fri 26/1219:45CNX - LHR
2 stops19h 20mลุฟท์ฮันซ่า
Thu 15/117:50LHR - CNX
2 stops18h 10mลุฟท์ฮันซ่า
Deal found 4/7฿31,546
Mon 29/912:35CNX - LHR
1 stop23h 20mMalaysia Airlines
Mon 13/1011:00LHR - CNX
1 stop20h 40mMalaysia Airlines
Deal found 5/7฿32,547
Fri 12/911:20CNX - LHR
1 stop35h 10mChina Airlines
Mon 22/921:10LHR - CNX
1 stop31h 10mChina Airlines
Deal found 5/7฿34,485
Sat 13/920:00CNX - LHR
2 stops22h 25mEmirates
Fri 19/916:50LHR - CNX
2 stops20h 20mEmirates
Deal found 4/7฿35,292
Sat 29/1108:50CNX - LHR
1 stop16h 35mเอทิฮัดแอร์เวย์
Mon 15/1209:00LHR - CNX
1 stop14h 05mเอทิฮัดแอร์เวย์
Deal found 4/7฿35,324

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 6 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

Sat 20/12

23:05-17:50

1 stop25h 45m

London Heathrow

Sat 3/1

20:25-21:50

1 stop18h 25m

฿27,898

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 18/8

16:20-18:40

2 stops32h 20m

London Heathrow

Mon 25/8

21:20-13:25

1 stop34h 05m

฿29,318

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 29/9

06:30-18:45

2 stops18h 15m

London Heathrow

Mon 13/10

09:30-12:05

2 stops20h 35m

฿29,512

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 1/12

18:50-18:15

1 stop30h 25m

London Heathrow

Sun 21/12

21:30-17:50

2 stops37h 20m

฿31,288

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

฿31,546

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 29/9

12:35-05:55

1 stop23h 20m

London Heathrow

Mon 13/10

11:00-13:40

1 stop20h 40m

฿32,547

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

฿34,485

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

฿35,292

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 29/11

08:50-18:25

1 stop16h 35m

London Heathrow

Mon 15/12

09:00-06:05

1 stop14h 05m

฿35,324

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 27/10

19:40-17:55

2 stops29h 15m

฿12,464

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 15 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 6 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 6 July 2025.
Read reviews from past customers who have flown with Korean 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.

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

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 ฿27,898, 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 China Eastern and China Southern - these airlines can fly you to your destination from ฿29,318 and ฿31,288, 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 ฿12,528. Users have also found prices from ฿17,598 and ฿21,020 on China Eastern and ออสเตรียนแอร์ไลน์, 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

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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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