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Cheap Flights from Chiang Mai to London Heathrow

Compare Chiang Mai to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from Chiang Mai to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Chiang Mai Airport to London Heathrow Airport? If you want to travel next month, return fares start from ج.م.‏ 44,013. Find the lowest prices on one-way and return tickets right here.
London.ج.م.‏ 17,576 per passenger.Departing Tue, 3 Nov.One-way flight with Thai VietJet Air.Outbound indirect flight with Thai VietJet Air, departs from Chiang Mai on Tue, 3 Nov, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 17,576, select.
London.ج.م.‏ 19,363 per passenger.Departing Fri, 30 Oct.One-way flight with Thai AirAsia.Outbound indirect flight with Thai AirAsia, departs from Chiang Mai on Fri, 30 Oct, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 19,363, select.
London.ج.م.‏ 19,952 per passenger.Departing Wed, 27 May.One-way flight with Thai AirAsia.Outbound indirect flight with Thai AirAsia, departs from Chiang Mai on Wed, 27 May, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 19,952, select.
London.ج.م.‏ 20,636 per passenger.Departing Thu, 4 Jun.One-way flight with Jeju Air.Outbound indirect flight with Jeju Air, departs from Chiang Mai on Thu, 4 Jun, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 20,636, select.
London.ج.م.‏ 21,084 per passenger.Departing Tue, 1 Dec.One-way flight with Thai AirAsia.Outbound indirect flight with Thai AirAsia, departs from Chiang Mai on Tue, 1 Dec, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 21,084, select.
London.ج.م.‏ 21,992 per passenger.Departing Thu, 2 Jul.One-way flight with Thai VietJet Air.Outbound indirect flight with Thai VietJet Air, departs from Chiang Mai on Thu, 2 Jul, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 21,992, select.
London.ج.م.‏ 24,700 per passenger.Departing Mon, 21 Sep.One-way flight with Gulf Air.Outbound indirect flight with Gulf Air, departs from Chiang Mai on Mon, 21 Sep, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 24,700, select.
London.ج.م.‏ 25,812 per passenger.Departing Fri, 29 Jan.One-way flight with Malaysia Airlines.Outbound indirect flight with Malaysia Airlines, departs from Chiang Mai on Fri, 29 Jan, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 25,812, select.
London.ج.م.‏ 25,812 per passenger.Departing Sat, 6 Mar.One-way flight with Malaysia Airlines.Outbound indirect flight with Malaysia Airlines, departs from Chiang Mai on Sat, 6 Mar, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 25,812, select.
London.ج.م.‏ 25,850 per passenger.Departing Sun, 21 Feb.One-way flight with Malaysia Airlines.Outbound indirect flight with Malaysia Airlines, departs from Chiang Mai on Sun, 21 Feb, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 25,850, select.
London.ج.م.‏ 26,038 per passenger.Departing Thu, 6 Aug.One-way flight with Nok Air.Outbound indirect flight with Nok Air, departs from Chiang Mai on Thu, 6 Aug, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 26,038, select.
London.ج.م.‏ 28,190 per passenger.Departing Wed, 21 Apr.One-way flight with Malaysia Airlines.Outbound indirect flight with Malaysia Airlines, departs from Chiang Mai on Wed, 21 Apr, arriving in London Heathrow.Price includes taxes and charges.From ج.م.‏ 28,190, select.

Find the cheapest month to fly from Chiang Mai to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chiang Mai to London Heathrow flights are currently cheapest in November.
May
from ج.م.‏ 19,952
Jun
from ج.م.‏ 20,636
Jul
from ج.م.‏ 21,992
Aug
from ج.م.‏ 26,038
Sep
from ج.م.‏ 24,700
Oct
from ج.م.‏ 19,363
Nov
from ج.م.‏ 17,576
Dec
from ج.م.‏ 21,084
Jan
from ج.م.‏ 25,812
Feb
from ج.م.‏ 25,850
Mar
from ج.م.‏ 25,812
Apr
from ج.م.‏ 28,190

Chiang Mai to London Heathrow: Alternative routes

Compare routes from Chiang Mai to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

London City

12km from central London
Closest
from ج.م.‏ 23,733
Search flights

London Heathrow

23km from central London
from ج.م.‏ 17,576
Search flights

London Gatwick

40km from central London
Cheapest
from ج.م.‏ 13,547
Search flights

London Luton

45km from central London
from ج.م.‏ 20,155
Search flights

London Stansted

49km from central London
from ج.م.‏ 16,356
Search flights

London Southend

57km from central London
from ج.م.‏ 25,745
Search flights

Chiang Mai to London: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 17,576
Cheapest month to flyNovember

Finding cheap flights from Chiang Mai to London Heathrow: Frequently asked questions

The best price we found for a return flight from Chiang Mai to London Heathrow is ج.م.‏ 44,013. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Chiang Mai to London Heathrow. But we found flights with one or more stops from ج.م.‏ 44,013.
As of May 2026, there are no flights flying from Chiang Mai to London Heathrow.
The cheapest month to fly from Chiang Mai to London Heathrow is usually June.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chiang Mai Airport to London Heathrow Airport on Monday, 8 June 2026.
No airlines currently offer direct flights between Chiang Mai Airport and London Heathrow Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Air China offers the cheapest flight tickets to London Heathrow.

Flying from Chiang Mai International Airport (CNX) to London Heathrow Airport (LHR): what you need to know

  • London's timezone is UTC+0, which makes London seven hours behind Chiang Mai.

  • Your CNX to LHR flight won't wait if you're late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • You'll likely experience longer queues during popular months such as August. Arriving up to four hours ahead of an international flight and two hours for a domestic departure is a wise move.

  • Think about adding a stopover when booking your ticket from Chiang Mai International Airport to London Heathrow Airport. Simply uncheck 'Direct flights only' to break up your journey, or maybe even explore a new city along the way. Here's where you can stop between CNX and LHR:

    • Suvarnabhumi Airport

    • Hong Kong International Airport

    • Kuala Lumpur International Airport

How to find the cheapest flights from Chiang Mai International Airport (CNX) to London Heathrow Airport (LHR)

  • ج.م.‏ 17,576 is the lowest price for a one-way Chiang Mai International Airport to London Heathrow Airport flight. A return flight starts at ج.م.‏ 44,013. These fares can change based on availability and demand.

  • To score cheap tickets from CNX to LHR, book as early as you can. Airlines typically offer the most competitive fares when flights are first released.

  • The 'Whole month' tool shows you the cheapest flights from Chiang Mai International Airport to London Heathrow Airport across each month. It's a good way to snap up a bargain if your travel dates are flexible.

  • There's no need to check back in every day to find out if fares have dropped when you create a Price Alert. We'll update you as soon as there's a new deal on cheap flights from CNX to LHR.

  • Tailor your trip using filters. Pick your arrival and departure times, airlines and total journey duration. You can also sort results by 'Best,' 'Fastest' or 'Cheapest' flights from Chiang Mai International Airport to London Heathrow Airport.

Handy information about Chiang Mai International Airport (CNX)

  • 76.37% of flights departing from Chiang Mai International Airport make it to their destination on schedule.

  • To get to Chiang Mai International Airport from central Chiang Mai, it takes around 10 minutes if you're planning to drive. This depends on traffic, however. It's approximately 5 kilometres from the airport to the city centre.

  • The trip when using public transport takes roughly 25 minutes.

  • Taking an early flight from Chiang Mai International Airport to London Heathrow Airport? Avoid the stress of rushing to the airport (and sneak in some extra precious sleep) by picking one of these hotels close to CNX:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport is roughly 31 kilometres from the centre of London. The drive time takes about 55 minutes.

  • It takes around 1 hour to get there using public transport.

When to fly to London Heathrow Airport (LHR)

  • It's time to work out your trip dates for your flight from Chiang Mai International Airport to London Heathrow Airport. July is the busiest month to visit London. If you like a quieter vibe, go in February.

  • The warmest month in London is July, with the temperature ranging between 11ºC and 26ºC. Lock in your flights from Chiang Mai International Airport to London Heathrow Airport in this month if this is the type of weather you like.

  • Search for cheap tickets from CNX to LHR in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between 0ºC and 9ºC on average.

Explore more of United Kingdom

  • Birmingham is just one of the many places in United Kingdom waiting to be explored after you've seen London. Around 161 kilometres away to the north-west, popular attractions include Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Bristol is another essential stop in United Kingdom and is around 177 kilometres west of London. No journey is complete without a visit to Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.

Plan the rest of your trip from Chiang Mai to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.