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Cheap flights from Chiang Mai to London Heathrow Airport from ฿8,817

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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
7 Sep — 14 Sep1
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 2 September 2025.

Round-trip from

฿22,188

One-way from

฿8,817

Popular in

June

Cheapest in

October

Average price

฿38,951
China Southern
  • China Southern
  • 15/10-22/10
  • 3 total stops
  • 93h 00m total
  • Chiang Mai to London
Search Deals
2/12
  • 2/12
  • 2 total stops
  • 31h 50m total
  • Chiang Mai to London
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (฿114,368 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (฿34,685 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 2 September 2025.

Wed 15/1018:50CNX - LHR
1 stop30h 10mChina Southern
Wed 22/1021:00LHR - CNX
2 stops62h 50mChina Southern
Deal found 31/8฿22,188
Wed 15/1023:05CNX - LHR
1 stop27h 25mAir China
Wed 22/1020:25LHR - CNX
1 stop19h 25mAir China
Deal found 31/8฿23,545
Wed 15/1014:55CNX - LHR
1 stop33h 45mChina Eastern
Wed 22/1021:20LHR - CNX
3 stops29h 45mChina Eastern
Deal found 31/8฿27,421
Tue 2/914:55CNX - LHR
1 stop33h 45mChina Eastern
Sun 5/1021:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 2/9฿29,843
Sat 20/1223:05CNX - LHR
1 stop25h 45mAir China
Sat 3/117:40LHR - CNX
1 stop21h 10mAir China
Deal found 30/8฿30,457
Fri 12/914:55CNX - LHR
1 stop33h 45mChina Eastern
Mon 22/921:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 31/8฿32,039
Tue 14/1000:45CNX - LHR
1 stop24h 05mAsiana Airlines
Wed 22/1020:40LHR - CNX
1 stop21h 00mAsiana Airlines
Deal found 31/8฿33,428
Fri 12/914:55CNX - LHR
1 stop33h 45mChina Eastern
Fri 19/921:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 1/9฿34,203

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 2 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

Wed 15/10

18:50-19:00

1 stop30h 10m

London Heathrow

Wed 22/10

21:00-17:50

2 stops62h 50m

฿22,188

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 15/10

23:05-20:30

1 stop27h 25m

London Heathrow

Wed 22/10

20:25-21:50

1 stop19h 25m

฿23,545

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 15/10

14:55-18:40

1 stop33h 45m

London Heathrow

Wed 22/10

21:20-09:05

3 stops29h 45m

฿27,421

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 20/12

15:35-17:30

1 stop32h 55m

London Heathrow

Sat 3/1

21:00-14:20

1 stop34h 20m

฿29,875

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 20/12

23:05-17:50

1 stop25h 45m

London Heathrow

Sat 3/1

17:40-21:50

1 stop21h 10m

฿30,457

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

฿32,039

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 14/10

00:45-18:50

1 stop24h 05m

London Heathrow

Wed 22/10

20:40-23:40

1 stop21h 00m

฿33,428

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Fri 12/9

14:55-18:40

1 stop33h 45m

London Heathrow

Fri 19/9

21:20-13:25

1 stop34h 05m

฿34,203

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 2/12

08:05-08:55

2 stops31h 50m

฿8,817

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 2/12

18:50-18:35

1 stop30h 45m

฿9,011

Flights are sorted by cheapest return flights first.

Deals found on 1/9

Showing 1-10 of 18 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 2 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.

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 China Southern, Air China, and China Eastern fly from Chiang Mai to London Heathrow Airport in about 27h 25m. The time it takes to get you to your destination can typically vary by up to 6h 20m. 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.

  • 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 ฿1,016). 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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