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Cheap flights from Chiang Mai to London Heathrow Airport from £216

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 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — LHR
20 Aug — 27 Aug1
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 15 August 2025.

Round-trip from

£622

One-way from

£216

Popular in

June

Cheapest in

October

Average price

£808
China Southern
  • China Southern
  • 27/9-4/10
  • 2 total stops
  • 64h 00m total
  • Chiang Mai to London
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China Southern
  • China Southern
  • 17/12
  • 1 total stop
  • 30h 25m total
  • Chiang Mai to London
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£61 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
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Average for round-trip flights in August 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 15 August 2025.

Sat 27/915:30CNX - LHR
1 stop33h 45mMultiple Airlines
Sat 4/1022:10LHR - CNX
1 stop30h 15mMultiple Airlines
Deal found 13/8£622
Sat 27/918:50CNX - LHR
1 stop30h 10mChina Southern
Sat 4/1021:00LHR - CNX
2 stops31h 25mChina Southern
Deal found 13/8£639
Sat 13/923:05CNX - LHR
1 stop27h 25mAir China
Fri 19/922:40LHR - CNX
1 stop17h 10mAir China
Deal found 14/8£670
Mon 1/923:05CNX - LHR
1 stop27h 25mAir China
Fri 12/920:25LHR - CNX
1 stop19h 25mAir China
Deal found 15/8£674
Wed 3/914:55CNX - LHR
1 stop33h 45mChina Eastern
Sat 20/921:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 14/8£688
Mon 1/914:55CNX - LHR
1 stop33h 45mChina Eastern
Sat 13/921:20LHR - CNX
1 stop34h 05mChina Eastern
Deal found 15/8£701
Mon 1/918:50CNX - LHR
1 stop30h 10mChina Southern
Sun 14/919:15LHR - CNX
2 stops40h 35mChina Southern
Deal found 15/8£702

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 858,174 searches. Data last updated 15 August 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 27/9

15:30-19:15

1 stop33h 45m

London Heathrow

Sat 4/10

22:10-10:25

1 stop30h 15m

£622

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 27/9

18:50-19:00

1 stop30h 10m

London Heathrow

Sat 4/10

21:00-10:25

2 stops31h 25m

£639

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 13/9

23:05-20:30

1 stop27h 25m

London Heathrow

Fri 19/9

22:40-21:50

1 stop17h 10m

£670

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 2/9

23:05-17:45

1 stop24h 40m

London Heathrow

Fri 12/9

20:25-21:50

1 stop19h 25m

£674

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 1/9

23:05-20:30

1 stop27h 25m

London Heathrow

Fri 12/9

20:25-21:50

1 stop19h 25m

£674

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 2/9

23:05-17:45

1 stop24h 40m

London Heathrow

Sun 14/9

20:25-21:50

1 stop19h 25m

£674

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 1/9

23:05-20:30

1 stop27h 25m

London Heathrow

Sun 14/9

22:40-21:50

1 stop17h 10m

£674

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 3/9

14:55-18:40

1 stop33h 45m

London Heathrow

Sat 20/9

21:20-13:25

1 stop34h 05m

£688

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 1/9

14:55-18:40

1 stop33h 45m

London Heathrow

Sat 13/9

21:20-13:25

1 stop34h 05m

£701

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 17/12

18:50-18:15

1 stop30h 25m

£216

Flights are sorted by cheapest return flights first.

Deals found on 14/8

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’s the top stopover airport for flights from Chiang Mai to London Heathrow Airport?

Share of one-stop return flights from Chiang Mai to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Bangkok (BKK) – chosen by Cheapflights users on 53% of one-stop itineraries from Chiang Mai to London Heathrow Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Chiang Mai to London Heathrow Airport?

Average return fare for one-stop flights from Chiang Mai to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Guangzhou (CAN) is the most affordable one-stop option, with an average return flight price of £482.

What’s the fastest stopover option from Chiang Mai to London Heathrow Airport?

Shortest average travel time for one-stop one-way flights from Chiang Mai to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Abu Dhabi (AUH) have the shortest average one-way travel time for one-stop routes: 16h 35m.

Which airport typically offers the quickest stopover for flights from Chiang Mai to London Heathrow Airport?

Average stopover duration for one-stop one-way flights from Chiang Mai to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Abu Dhabi (AUH) offer the fastest connection on this route, with an average stopover time of 1h 23m.

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?

    If you book a flight to London Heathrow from Chiang Mai, you will be flying from Chiang Mai, which is the city’s only airport. Chiang Mai (CNX) is located 1.9 mi from the center of Chiang Mai. There are 0 flights from Chiang Mai to London Heathrow per day from 0 different airlines.

  • 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, January is the cheapest month in which you can book a flight from Chiang Mai to London Heathrow Airport (average of £112). Flying from Chiang Mai to London Heathrow Airport in August is currently the most expensive (average of £164). 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
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Croydon
Hounslow
Gatwick
Slough
Northampton
Deal
Luton
Wembley
Crawley
Ilford
Hayes
Ipswich
Southend-on-Sea
Winchester
Folkestone
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Watford
Chichester

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How does Cheapflights help users find flights from Chiang Mai to Heathrow?

Cheapflights makes it easy to find Chiang Mai to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Chiang Mai to Heathrow.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Chiang Mai to Heathrow, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Chiang Mai to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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