Cheap flights from Chiang Mai to London Heathrow Airport from ฿8,974

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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

฿20,993

One-way from

฿8,974

Popular in

June

Cheapest in

October

Average price

฿38,339
เอทิฮัดแอร์เวย์
  • เอทิฮัดแอร์เวย์
  • 6/11-22/11
  • 2 total stops
  • 60h 25m total
  • Chiang Mai to London
China Southern
  • China Southern
  • 16/11
  • 1 total stop
  • 30h 45m total
  • Chiang Mai to London
Highest demand for flights based on searches. 13% potential increase in price (฿176,742 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (฿30,965 potential savings vs. average return price).
Average for round-trip flights in September 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 15 September 2025.

Thu 6/1108:50CNX - LHR
1 stop34h 15mเอทิฮัดแอร์เวย์
Sat 22/1120:55LHR - CNX
1 stop26h 10mเอทิฮัดแอร์เวย์
Deal found 14/9฿20,993
Thu 6/1118:50CNX - LHR
2 stops30h 05mChina Southern
Sat 22/1122:00LHR - CNX
1 stop36h 50mChina Southern
Deal found 14/9฿22,198
Thu 6/1108:50CNX - LHR
1 stop16h 20mMultiple Airlines
Sat 22/1122:15LHR - CNX
3 stops33h 20mMultiple Airlines
Deal found 14/9฿23,561
Sun 12/1023:05CNX - LHR
1 stop24h 40mAir China
Sun 26/1020:25LHR - CNX
1 stop18h 25mAir China
Deal found 14/9฿24,195
Thu 9/1014:40CNX - LHR
1 stop31h 55mMultiple Airlines
Sat 25/1020:25LHR - CNX
1 stop19h 25mMultiple Airlines
Deal found 14/9฿24,544
Wed 17/1223:05CNX - LHR
1 stop23h 50mAir China
Thu 1/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 14/9฿24,830
Mon 22/1223:05CNX - LHR
1 stop23h 50mAir China
Mon 5/120:25LHR - CNX
1 stop18h 25mAir China
Deal found 13/9฿24,861
Sat 11/1014:40CNX - LHR
1 stop31h 55mMultiple Airlines
Sat 25/1022:40LHR - CNX
1 stop17h 10mMultiple Airlines
Deal found 14/9฿25,305
Fri 10/1014:55CNX - LHR
1 stop33h 45mChina Eastern
Sat 25/1021:20LHR - CNX
1 stop35h 00mChina Eastern
Deal found 14/9฿25,401
Thu 9/1010:05CNX - LHR
2 stops38h 35mChina Eastern
Sat 25/1021:20LHR - CNX
1 stop35h 00mChina Eastern
Deal found 14/9฿25,432
Sat 11/1014:40CNX - LHR
1 stop31h 55mMultiple Airlines
Mon 27/1020:25LHR - CNX
1 stop18h 25mMultiple Airlines
Deal found 14/9฿25,527
Mon 22/1214:30CNX - LHR
2 stops35h 05mMultiple Airlines
Mon 5/120:25LHR - CNX
1 stop18h 25mMultiple Airlines
Deal found 13/9฿25,559

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 15 September 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

Tue 3/3

14:50-15:25

1 stop31h 35m

London Heathrow

Fri 13/3

21:25-11:25

1 stop31h 00m

฿24,639

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

14:50-15:25

1 stop31h 35m

London Heathrow

Sat 7/3

10:25-11:25

1 stop18h 00m

฿25,147

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 22/12

14:30-18:35

2 stops35h 05m

London Heathrow

Mon 5/1

20:25-21:50

1 stop18h 25m

฿25,559

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 7/10

17:20-20:00

2 stops32h 40m

London Heathrow

Mon 27/10

20:25-21:50

1 stop18h 25m

฿25,749

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 1/10

12:35-16:35

1 stop34h 00m

London Heathrow

Wed 15/10

22:40-21:50

1 stop17h 10m

฿26,764

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 30/9

10:05-18:40

2 stops38h 35m

London Heathrow

Thu 16/10

20:25-21:50

1 stop19h 25m

฿26,954

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

฿27,367

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 9/10

18:50-19:00

1 stop30h 10m

London Heathrow

Wed 22/10

21:00-17:50

2 stops38h 50m

฿27,398

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 11/10

23:05-17:45

1 stop24h 40m

London Heathrow

Sat 18/10

20:25-21:50

1 stop19h 25m

฿28,508

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 29/9

09:25-19:15

1 stop15h 50m

London Heathrow

Wed 15/10

22:40-21:50

1 stop17h 10m

฿31,330

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 21 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 15 September 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.

How much does it cost for a return flight from Chiang Mai to London Heathrow Airport?

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 Malaysia Airlines fly from Chiang Mai to London Heathrow Airport in about 31h 35m. The time it takes to get you to your destination can typically vary by up to . The distance from Chiang Mai to London Heathrow Airport is about 9009 km.

  • 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 ฿1,014). 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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