Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Chiang Mai to London from £217

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chiang Mai to London departing on 20/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Chiang Mai to London

Cheap return flights

Logo
18:50 - 19:00CNX-LHR
30h 10m1 stop
Logo
20:25 - 21:50LHR-CNX
18h 25m1 stop
£514
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Etihad Airways Logo
08:50 - 18:10CNX-LHR
16h 20m1 stop
Etihad Airways Logo
20:55 - 06:05LHR-CNX
26h 10m1 stop
£541Etihad Airways
Find Deal
Thu, 5 Mar - Sat, 7 Mar
Logo
16:20 - 18:40CNX-LHR
32h 20m2 stops
Logo
17:40 - 21:50LHR-CNX
21h 10m1 stop
£574
Find Deal
Wed, 22 Oct - Wed, 29 Oct
China Southern Logo
18:50 - 19:00CNX-LHR
30h 10m1 stop
China Southern Logo
19:15 - 17:50LHR-CNX
40h 35m2 stops
£636China Southern
Find Deal
Wed, 8 Oct - Wed, 15 Oct
China Southern Logo
18:50 - 19:00CNX-LHR
30h 10m1 stop
China Southern Logo
21:00 - 17:50LHR-CNX
38h 50m2 stops
£681China Southern
Find Deal
Wed, 8 Oct - Mon, 13 Oct
Air China Logo
23:05 - 15:55CNX-LHR
23h 50m1 stop
Air China Logo
17:40 - 21:50LHR-CNX
21h 10m1 stop
£691Air China
Find Deal
Tue, 3 Mar - Fri, 13 Mar
Air China Logo
23:05 - 17:50CNX-LHR
25h 45m1 stop
Air China Logo
20:25 - 21:50LHR-CNX
18h 25m1 stop
£698Air China
Find Deal
Sat, 20 Dec - Sat, 3 Jan
China Eastern Logo
15:35 - 17:30CNX-LHR
32h 55m1 stop
China Eastern Logo
21:00 - 09:05LHR-CNX
29h 05m2 stops
£782China Eastern
Find Deal
Sat, 20 Dec - Sat, 3 Jan
Emirates Logo
20:00 - 14:25CNX-LHR
24h 25m2 stops
Emirates Logo
09:05 - 13:45LHR-CNX
22h 40m2 stops
£823Emirates
Find Deal
Mon, 6 Oct - Mon, 13 Oct
Emirates Logo
19:45 - 13:50CNX-LHR
25h 05m2 stops
Emirates Logo
09:10 - 13:45LHR-CNX
21h 35m2 stops
£856Emirates
Find Deal
Tue, 3 Mar - Fri, 13 Mar

Air China flights from Chiang Mai to London Heathrow Airport

Our best Air China deals on Chiang Mai to London Heathrow Airport flight tickets
Air China
3 Mar
CNX23:05Chiang Mai
23h 50m
1 stop
LHR15:55London Heathrow
13 Mar
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
£691
Find similar
Air China
20 Dec
CNX23:05Chiang Mai
25h 45m
1 stop
LHR17:50London Heathrow
3 Jan
LHR20:25London Heathrow
18h 25m
1 stop
CNX21:50Chiang Mai
£698
Find similar
Air China
20 Dec
CNX23:05Chiang Mai
25h 45m
1 stop
LHR17:50London Heathrow
3 Jan
LHR17:40London Heathrow
21h 10m
1 stop
CNX21:50Chiang Mai
£699
Find similar

Emirates flights from Chiang Mai to London Heathrow Airport

Our best Emirates deals on Chiang Mai to London Heathrow Airport flight tickets
Emirates
6 Oct
CNX20:00Chiang Mai
24h 25m
2 stops
LHR14:25London Heathrow
13 Oct
LHR09:05London Heathrow
22h 40m
2 stops
CNX13:45Chiang Mai
£823
Find similar
Emirates
3 Mar
CNX19:45Chiang Mai
25h 05m
2 stops
LHR13:50London Heathrow
13 Mar
LHR09:10London Heathrow
21h 35m
2 stops
CNX13:45Chiang Mai
£856
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chiang Mai to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 7 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

Fly to

Route

Depart

Return

Price

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 22/10

18:50-19:00

1 stop30h 10m

London Heathrow

Wed 29/10

20:25-21:50

1 stop18h 25m

£514

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Thu 5/3

08:50-18:10

1 stop16h 20m

London Heathrow

Sat 7/3

20:55-06:05

1 stop26h 10m

£541

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 22/10

16:20-18:40

2 stops32h 20m

London Heathrow

Wed 29/10

17:40-21:50

1 stop21h 10m

£574

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 8/10

18:50-19:00

1 stop30h 10m

London Heathrow

Wed 15/10

19:15-17:50

2 stops40h 35m

£636

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Wed 8/10

18:50-19:00

1 stop30h 10m

London Heathrow

Mon 13/10

21:00-17:50

2 stops38h 50m

£681

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 3/3

23:05-15:55

1 stop23h 50m

London Heathrow

Fri 13/3

17:40-21:50

1 stop21h 10m

£691

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

£698

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Sat 20/12

15:35-17:30

1 stop32h 55m

London Heathrow

Sat 3/1

21:00-09:05

2 stops29h 05m

£782

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Mon 6/10

20:00-14:25

2 stops24h 25m

London Heathrow

Mon 13/10

09:05-13:45

2 stops22h 40m

£823

Chiang MaiLondon

CNX - LHR

CNXLHR

Chiang Mai

Tue 3/3

19:45-13:50

2 stops25h 05m

London Heathrow

Fri 13/3

09:10-13:45

2 stops21h 35m

£856

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Chiang Mai to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Chiang Mai is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £530. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £1,038.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Chiang Mai to London Heathrow Airport in the evening for as low as £794. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £832 on average. Flights to London Heathrow Airport from Chiang Mai in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

How have Chiang Mai to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for Chiang Mai to London Heathrow Airport flights are approximately 33% more expensive when compared to flights at the same time last year.

When to book flights from Chiang Mai to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chiang Mai to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Chiang Mai to London Heathrow Airport (CNX to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chiang Mai to London Heathrow Airport

Direct flights

None
There are no direct flights from Chiang Mai to London Heathrow Airport. There are no popular flight routes from Chiang Mai to London Heathrow Airport.
Search flight deals

  • How far is Chiang Mai to London Heathrow by plane?

    Chiang Mai and London Heathrow are 5597.7 mi apart from one another. In terms of flight time, this usually takes a little over 15h 55m.

  • When did momondo last update prices for flights from Chiang Mai Airport to London Heathrow Airport?

    Prices for flights from Chiang Mai Airport to London Heathrow Airport are updated daily.

  • How old do you have to be to fly from Chiang Mai Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chiang Mai Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Maidstone
Northampton
Gatwick
Slough
Swindon
Stratford-upon-Avon
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Swanage
Colchester
Poole
Worthing
Salisbury
Chelmsford

Why use momondo?

Why should I use momondo to find a flight deal from Chiang Mai to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chiang Mai to London. momondo saves you time and could save you money on your trip.

Can I find flights from Chiang Mai to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Chiang Mai with this policy.

How can momondo help me find flights from Chiang Mai to London?

Once you have performed a search for Chiang Mai to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Chiang Mai to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Chiang Mai are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 12/9
Fri 19/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London