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Cheap flights from Chiang Mai to London Heathrow Airport from ฿8,388

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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
30 Nov — 7 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 31 October 2025.

Round-trip from

฿21,440

One-way from

฿8,388

Popular in

June

Cheapest in

December

Average price

฿26,362
China Eastern
  • China Eastern
  • 27/11-4/12
  • 4 total stops
  • 61h 10m total
  • Chiang Mai to London
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18/11
  • 18/11
  • 2 total stops
  • 31h 20m total
  • Chiang Mai to London
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Highest demand for flights based on searches. 10% potential increase in price (฿144,832 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿33,032 potential savings vs. average return price).
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Average for round-trip flights in October 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 31 October 2025.

Thu 27/1116:25CNX - LHR
2 stops32h 05mChina Eastern
Thu 4/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 30/10฿21,440
Sun 16/1123:05CNX - LHR
1 stop25h 45mAir China
Thu 4/1220:25LHR - CNX
1 stop18h 25mAir China
Deal found 30/10฿23,642
Sun 16/1123:05CNX - LHR
1 stop23h 50mAir China
Sun 30/1117:40LHR - CNX
1 stop21h 10mAir China
Deal found 29/10฿23,674
Thu 27/1116:25CNX - LHR
2 stops32h 05mMultiple Airlines
Thu 4/1220:25LHR - CNX
1 stop18h 25mMultiple Airlines
Deal found 30/10฿24,257
Thu 4/1208:50CNX - LHR
1 stop16h 20mMultiple Airlines
Sun 7/1220:25LHR - CNX
1 stop18h 25mMultiple Airlines
Deal found 29/10฿26,200
Thu 4/1215:35CNX - LHR
1 stop32h 55mChina Eastern
Sun 7/1221:00LHR - CNX
2 stops29h 05mChina Eastern
Deal found 29/10฿26,880
Wed 17/1223:05CNX - LHR
1 stop23h 50mAir China
Thu 1/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 30/10฿27,139
Tue 23/1223:05CNX - LHR
1 stop23h 50mAir China
Sat 3/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 29/10฿27,399
Thu 6/1115:35CNX - LHR
1 stop32h 55mChina Eastern
Thu 20/1121:00LHR - CNX
1 stop34h 20mChina Eastern
Deal found 30/10฿27,658

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 17,341 searches. Data last updated 31 October 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

Thu 27/11

23:05-15:55

1 stop23h 50m

London Heathrow

Thu 4/12

17:40-21:50

1 stop21h 10m

฿23,642

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 4/12

15:35-17:30

1 stop32h 55m

London Heathrow

Sun 7/12

21:00-09:05

2 stops29h 05m

฿26,880

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 9/3

10:10-12:15

2 stops33h 05m

London Heathrow

Sun 15/3

14:15-19:00

2 stops21h 45m

฿27,366

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 23/12

23:05-15:55

1 stop23h 50m

London Heathrow

Sat 3/1

17:40-21:50

1 stop21h 10m

฿27,399

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 9/3

10:35-15:00

1 stop35h 25m

London Heathrow

Sun 15/3

20:15-09:50

1 stop30h 35m

฿28,208

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 14/1

23:05-17:50

1 stop25h 45m

London Heathrow

Mon 19/1

17:40-21:50

1 stop21h 10m

฿28,791

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 3/3

23:05-17:50

1 stop25h 45m

London Heathrow

Fri 13/3

17:40-21:50

1 stop21h 10m

฿29,147

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 17/12

15:35-17:30

1 stop32h 55m

London Heathrow

Thu 1/1

21:00-14:20

1 stop34h 20m

฿29,536

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

16:25-17:30

2 stops32h 05m

London Heathrow

Sat 7/3

21:00-14:20

1 stop34h 20m

฿31,058

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 26/2

14:50-15:25

1 stop31h 35m

London Heathrow

Thu 12/3

10:25-11:25

1 stop18h 00m

฿31,835

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 22 results
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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 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 31 October 2025.

It’s typically best to fly out from Chiang Mai to London Heathrow Airport at midday. Doing so could potentially save you 26% on the flight price compared to flying in the morning, which is usually more expensive.

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.

  • How long is the flight from Chiang Mai to London Heathrow Airport?

    Airlines like Air China, China Eastern, and Cathay Pacific fly from Chiang Mai to London Heathrow Airport in about 23h 50m. The time it takes to get you to your destination can typically vary by up to 11h 35m. The distance from Chiang Mai to London Heathrow Airport is about 9009 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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
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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