LHR - CNX

£260 Find Cheap Flights from London Heathrow Airport to Chiang Mai – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Chiang Mai departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£583
Typical prices: £611-£865
China Eastern
Thu 17/9Sat 3/10
LHR - CNX • 1 stop
Cheapest one-way flight
£260
Typical prices: £509-£673
Multiple Airlines
Wed 9/9
LHR - CNX • 2 stops
Top airlines
Cheapest • from £583 (return)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Heathrow and Chiang Mai. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £560 (return)
Shortest trip • 15h 07m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Chiang Mai!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Chiang Mai (LHR-CNX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Chiang Mai that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Chiang Mai

Thu, 17 Sep - Sat, 3 Oct
China Eastern Logo
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
China Eastern Logo
14:55 - 18:40
CNX
-
LHR
33h 45m
1 stop
£583China Eastern
Sun, 20 Sep - Mon, 5 Oct
Multiple Airlines Logo
22:40 - 21:50
LHR
-
CNX
17h 10m
1 stop
Multiple Airlines Logo
14:35 - 07:00
CNX
-
LHR
22h 25m
2 stops
£584Multiple Airlines
Mon, 21 Sep - Mon, 5 Oct
Multiple Airlines Logo
22:40 - 21:50
LHR
-
CNX
17h 10m
1 stop
Multiple Airlines Logo
14:35 - 07:00
CNX
-
LHR
22h 25m
2 stops
£585Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
Multiple Airlines Logo
14:35 - 07:00
CNX
-
LHR
22h 25m
2 stops
£587Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
22:40 - 07:25
LHR
-
CNX
26h 45m
2 stops
Multiple Airlines Logo
14:30 - 20:25
CNX
-
LHR
35h 55m
2 stops
£590Multiple Airlines
Mon, 4 Jan - Thu, 21 Jan
Air China Logo
20:25 - 21:50
LHR
-
CNX
18h 25m
1 stop
Air China Logo
23:05 - 15:55
CNX
-
LHR
23h 50m
1 stop
£590Air China
Mon, 7 Sep - Tue, 15 Sep
Etihad Airways Logo
09:30 - 19:10
LHR
-
CNX
27h 40m
2 stops
Etihad Airways Logo
14:35 - 12:45
CNX
-
LHR
28h 10m
2 stops
£593Etihad Airways
Mon, 7 Sep - Mon, 14 Sep
Etihad Airways Logo
14:45 - 19:10
LHR
-
CNX
22h 25m
2 stops
Etihad Airways Logo
11:55 - 07:00
CNX
-
LHR
25h 05m
2 stops
£593Etihad Airways
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
21:20 - 13:25
LHR
-
CNX
34h 05m
1 stop
Multiple Airlines Logo
14:35 - 07:00
CNX
-
LHR
22h 25m
2 stops
£594Multiple Airlines
Wed, 2 Sep - Tue, 8 Sep
Etihad Airways Logo
09:30 - 19:10
LHR
-
CNX
27h 40m
2 stops
Etihad Airways Logo
10:10 - 15:05
CNX
-
LHR
34h 55m
2 stops
£595Etihad Airways
Booking Insights

KAYAK’s insights & trends for Heathrow to Chiang Mai flights

Get data-powered insights and trends into flights from Heathrow to Chiang Mai to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from London Heathrow Airport to Chiang Mai?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to Chiang Mai departing in September.

Flight prices are below average for this route right now.

Flights to Chiang Mai from London Heathrow Airport usually cost between £845 and £923 in September.
The lowest price found in the past 5 days was £583 on China Eastern (17 Sept–3 Oct).

What is the cheapest month to fly from London Heathrow Airport to Chiang Mai?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Chiang Mai is November, where tickets cost £564 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is £1,085 and £1,006 respectively.

How far in advance should I book a flight from London Heathrow Airport to Chiang Mai?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Heathrow Airport to Chiang Mai, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Chiang Mai

Low season

August

Cheapest flight

£260
Best time to beat the crowds but there is an average 19% increase in price.
Most popular time to fly and prices are also 26% lower on average.
Flight from London Heathrow Airport to Chiang Mai

When to book flights from Heathrow to Chiang Mai

Are your dates flexible? Find out the best times to travel from Heathrow to Chiang Mai based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Heathrow Airport to Chiang Mai flights

  • What is the cheapest flight from London Heathrow Airport to Chiang Mai?

    In the last 5 days, the lowest price for a flight from London Heathrow Airport to Chiang Mai was £260 for a one-way ticket and £583 for a return.

  • Which aircraft models fly most regularly from London Heathrow Airport to Chiang Mai?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London Heathrow Airport to Chiang Mai?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between London Heathrow Airport and Chiang Mai, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from London to Chiang Mai, EVA Air or Thai Airways?

    The two airlines most popular with KAYAK users for flights from London to Chiang Mai are EVA Air and Thai Airways. With an average price for the route of £877 and an overall rating of 8.5, EVA Air is the most popular choice. Thai Airways is also a great choice for the route, with an average price of £944 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Chiang Mai?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Chiang Mai.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Chiang Mai?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chiang Mai from London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Chiang Mai?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Chiang Mai with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Chiang Mai?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chiang Mai from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Heathrow to Chiang Mai

 
See real verified KAYAK customer reviews for airlines flying from London to Chiang Mai. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Chiang Mai? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Thai AirwaysOverall score based on 412 reviews
8.0Boarding
7.5Food
7.7Comfort
8.4Crew
6.9Entertainment
Airline reviews

Excellent service in business class. Well worth the slightly higher fare as it includes lounge access, additional luggage weight and a full hot meal on board.

10.0 ExcellentRamon, Jul 2026
BKK - KKC
Read more Thai Airways reviews

Excellent service in business class. Well worth the slightly higher fare as it includes lounge access, additional luggage weight and a full hot meal on board.

We still get drinks and a snack. Love the gift bags too.

Excellent airline. The plane was clean and the staff were very attentive

I'm not interested in improving the airline. Therefore, I won't explain this in more detail. Next time I'll try a different one.

The flight (boarding) was delayed by 40-50 minutes and there was very crowed. They need to improve on the timeliness & boarding process. (They asked passenger to board in groups, but the 2nd group was standing there waiting for 20 minutes!). However, services from the crew was very good, also the food was good as well. I also found the legroom was quite comfortable.

Except that our flight was cancelled, by mail, and later moved to 12 hours prior, then the experience was good. In Bangkok we were offered a hotel, it was fine, but would have been nice to know in advance😉

Although booked meal of fruit only The crew had not received this special meal The same happened on my flight Bangkok / CAN The films are so old that best is to use own computer to watch downloads . Serve nuts but they do not warm up . Service is attentive , WC clean

The flight attendants ignored us several times which was annoying. The sandwich thing wasn't very good but it's only an hour flight, it would have been better to have entertainment over bad food.

Check in was a disaster. 90 minutes and only 2 economy check in desks open. Had to rush to catch the flight.

I couldnt go on this flight and lost all my money over 1,000 UK Pounds as my visa to Myanmar was not accepted :(

I was upgraded to business class. Seats same size but better food. Polite service.

Just overall a poor experience with little to justify the price of the ticket!

Absolutely the worst food I've ever had on any flight. Otherwise, the flight is OK - just your regular transatlantic economy. Condor should stop saving pennies on meals. They save a penny, lose a dollar.

This is truly the worst travel experience of my life. The UK ETA program had a technical failure, and I was stuck in limbo for 24 hours, unable to board my flight and unable to navigate anything in my itinerary. I had to rebook an entirely new flight and I’m now out doubled the money. Unconscionable.

They had me unpack a handbag 2 lbs overweight into another handbag 8 lbs underweight for a Bible.

Five star experience all around except for my seat, which was broken. It would only go down 70%.Of the way. It defeats the purpose of buying a business class ticket if you don’t actually get to lay flat..

A bellow average experience. A delayed flight , no staff to assist , running and panic to connecting flight , 2 hour wait for customer service. No luggage when we arrived , luggage delivered 3 days after at 3:45 AM !!!! Much stress and anxiety from this experience. Please repair your Brand .

From all the segments I flew it was the only one I did not get the option to choose ni seat, I did not get the quality of seat I had paid for. Crew was nice, airplane was clean, but no food, only water and a small courtesy chocolate. Everything else you had to pay for.

Management and staff att viena wasn’t professional,and they are not good by how to communicate and solve the problem, I was shocked , as I know Austrian airlines was amusing Thank you

Food: my selection was pasta with vegetables, though it was potatoes not pasta. Breakfast was 2 rolls and some sort of spreads— not sure what they were. Worst thing was that we had to wait for over 90 minutes for our bags to show up at O’Hare

The meals were not the greatest and lacking of appetite but everything else was spot on

On time. Friendly and helpful flight attendants. The plane was clean. Having a wine available would have been nice.

Worst than I expected, crew was not attentive, meal was as disgusting , they didn’t even drink selections as they would to other passengers. I felt discriminated

cannot get seat information for LAX to IAH when check in in XI,AN

I hate that you cannot check in online and when you are at the airport, there aren't any aisle seats left. Also, they could work a little on subtitles for their movies (not everyone is a native English speaker).

Communication between the captain/crew and the passengers needs to be improved.

Food and service are good. Bathroom was lack of lotions and cleaning. That should be improved.

Chinese flight attendants didn't speak english well. They didn't care enough to remember that I (east asian who isn't Chinese) wasn't Chinese and spoke English. Announcement in english on board was poor and I find it very difficult to understand what was announced. Also, a cabin bag allows only 5kg!

I wish I had been able to choose a vegetarian meal. Crew friendly and helpful. Seat was ok. All quite efficient and pleasant. Would recommend for inner China travel for sure.

We bought premium Economy, thinking it would be more comfortable, but the seat is so narrow ,that my legs and feet are swollen , I can't wear shoes !

I booked tickets for a family of five and specifically paid extra to select our seats together. We spent nearly $1,000 extra (around $100 per seat) for extra legroom so we could sit near each other. However, despite paying for this, we ended up being separated on the flight. This caused a major issue for our family because my parents do not speak English and rely on me to translate and assist them during the journey. I do not understand why Etihad changed our reserved seats without explanation. I am extremely dissatisfied with this experience. I expect the airline to do better, and I am requesting a full refund for the seat selection fees we paid.

1 hour delay meant missed my connecting flight and 1st day of holiday

We have paid premium price for a business class Cabinet and we have received the old 777 with the following apart business class that is not to standard. It was very disappointing and it’s a very bad reputation for a premium airline company. This aeroplane should be the commission from being as a business class. We will pass this knowledge to our colleagues because the quality of business class in Etihad is not consistent and it is a lucky dip that sometimes you’re getting a good aeroplane and sometimes you’re getting their 30 years old aeroplane. The crew of the aeroplane have apologise and said that they hate this aeroplane and they have complained about it multiple times as well. Obviously Etihad is putting the economy in front of the Customer Experience. For the future we will not take this risk anymore and will fly with established company like emirates.

Etihad Check In counter/Station manager in Heathrow was bothering and not helpful at all. They are rude and not customer oriented

I paid 44 $ for seat upgrade (22D) and my seat was stack in high position for all the 6 hours of flight. I don't recommend the upgrade. I am looking to get my upgrade payment back

Same problem place in the middle so small Im 1,85 m so not good 👍

I am a larger than average person and in my opinion i don't think it's fair to allocate a window seat to anyone who is my size or larger, i was seated between 2 large passengers on a full aircraft. The guy in the window seat also occupied a portion of the middle seat (my seat) which made my experience of flying with etihad very cramped and uncomfortable, i was flying from Abu Dhabi to Bangkok. Had this been a airbus 380 it would have been better as the seats are larger but unfortunately it wasn't so i had to endure the 6+hrs unable to get any rest

The business class experience is fantastic. The crew were polite but often unavailable even when I tried to call them! I even found myself bringing my used dishes and cutlery up to the crew because no one had come to collect it after over an hour.

The staff was very nice and polite but it was very very hot and no ways to have some fresh air. It would be nice to have more time to sleep since it was a night flight

Very very bad service very tight seats never ever flying with Etihad again

Small plane with only two lavatories at the back. You must have a good plan to use it before or after the meal, if you make a bad decision, you will end up with standing in front of the toilet for a while till the food carts empty. The good thing is even there’s a slightly delayed, the plane is still arriving on time which is superb!!

good flight. food is only so so. I actually did not eat the snack. it does not look too good on the passenger next to me.

Delay in off-boarding due to customs at SFO... pilot announcement should have come earlier so passengers don't clog aisles.

Better good than most, if not all European airlines. If you’re stuck in an economy seat anyways, China Eastern is a good choice because of shorter flight time, being able to overfly Russia

Flight was delayed for more than 3 hours, food was mediocre, seat didn’t recline

Lost Baggage - very frustrated…learned that bag was never put on plane.

Cheapest option from Gatwick £400 cheaper than Emirates and Qatar. Entertainment no where near as good as Emirates and Qatar, but saved £400 so all good.

Great staff and food. Seats pretty uncomfortable but plenty of legroom. Entertainment system outdated.

We were cutting it close on our connecting flight and notified all staff at departing gate and flight attendants. From the start, we were told to check in with the international transfer desk by everyone, except for one lady who wanted to argue the time difference that was already taken into account. We also asked if we could try to exit the plane first (our family of 4 and 8 others on the same connecting flight). They just told us to check in with international transfers. We landed and had very little time to make our next flight. We were not offered any assistance or communication to the receiving gate. We ran all the way to the international transfers gate only to be turned away. I think we could have made it if we were allowed to exit and a call was made to other check in counter. After that we spent 6 grueling hours with our kids trying to rebook a flight. No food of any type of compensation was offered besides a dirty hotel room. The ladies with China Eastern at the Shanghai International counter were rude an unhelpful. We were directed to 3 different counters and waited before they said they forgot about a hotel. It was a long, miserable day. I believe this could have all been avoided.

Flight was fine, however we were not able to check in online, this adds to travel stress. Luckily check-in at Heathrow was quick, but we did not get the seats we paid extra for. We paid for a window and 2 aisle seats from Shanghai to Tokyo leg, but they changed us to middle seats. Not good :(

Everything you need to know for your flight from Heathrow to Chiang Mai

Information on your arrival and departure airports