LHR - CNX

£305 Find Cheap Flights from London Heathrow Airport to Chiang Mai

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 15/9. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Chiang Mai

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chiang Mai.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chiang Mai.
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Everything you should know

Cheapest return fare
£488
Typical prices: £787-£557
Multiple Airlines
Wed 17/6Sun 21/6
LHR - CNX • 2 stops
Cheapest one-way flight
£305
Typical prices: £496-£630
China Eastern
Tue 15/9
LHR - CNX • 1 stop
Top airlines
Cheapest • from £596 (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
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Insights
Top stopover airports
Cheapest • Avg £553 (return)
Shortest trip • 15h 28m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 6 weeks in advance save around 5% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% 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

Wed, 17 Jun - Sun, 21 Jun
Multiple Airlines Logo
10:00 - 22:50
LHR
-
CNX
30h 50m
2 stops
Multiple Airlines Logo
08:00 - 07:30
CNX
-
LHR
29h 30m
2 stops
£488Multiple Airlines
Wed, 10 Jun - Sat, 27 Jun
Multiple Airlines Logo
16:15 - 17:15
LHR
-
CNX
19h 00m
2 stops
Multiple Airlines Logo
17:45 - 20:30
CNX
-
LHR
32h 45m
2 stops
£510Multiple Airlines
Wed, 10 Jun - Wed, 24 Jun
Multiple Airlines Logo
16:15 - 20:25
LHR
-
CNX
22h 10m
2 stops
Multiple Airlines Logo
08:00 - 12:40
CNX
-
LHR
34h 40m
2 stops
£514Multiple Airlines
Wed, 13 May - Tue, 26 May
Multiple Airlines Logo
10:00 - 17:15
LHR
-
CNX
25h 15m
2 stops
Multiple Airlines Logo
07:00 - 07:30
CNX
-
LHR
30h 30m
2 stops
£534Multiple Airlines
Wed, 13 May - Tue, 26 May
Multiple Airlines Logo
10:00 - 20:25
LHR
-
CNX
28h 25m
2 stops
Multiple Airlines Logo
07:00 - 07:30
CNX
-
LHR
30h 30m
2 stops
£534Multiple Airlines
Mon, 8 Jun - Mon, 22 Jun
Multiple Airlines Logo
16:15 - 17:55
LHR
-
CNX
19h 40m
2 stops
Multiple Airlines Logo
07:00 - 12:40
CNX
-
LHR
35h 40m
2 stops
£537Multiple Airlines
Fri, 12 Jun - Fri, 26 Jun
Multiple Airlines Logo
16:15 - 20:25
LHR
-
CNX
22h 10m
2 stops
Multiple Airlines Logo
08:00 - 12:40
CNX
-
LHR
34h 40m
2 stops
£557Multiple Airlines
Wed, 10 Jun - Fri, 26 Jun
Multiple Airlines Logo
16:15 - 20:25
LHR
-
CNX
22h 10m
2 stops
Multiple Airlines Logo
08:00 - 12:40
CNX
-
LHR
34h 40m
2 stops
£576Multiple Airlines
Fri, 12 Jun - Fri, 26 Jun
Multiple Airlines Logo
10:00 - 22:00
LHR
-
CNX
30h 00m
2 stops
Multiple Airlines Logo
22:30 - 12:40
CNX
-
LHR
20h 10m
2 stops
£588Multiple Airlines
Fri, 12 Jun - Fri, 26 Jun
Multiple Airlines Logo
10:00 - 17:15
LHR
-
CNX
25h 15m
2 stops
Multiple Airlines Logo
22:30 - 12:40
CNX
-
LHR
20h 10m
2 stops
£589Multiple Airlines
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 June.

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 May, where tickets cost £613 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £983 and £925 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 6 weeks before departure, which saves you about 5% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

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

Low seasonSeptember
Cheapest flight£305
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly and prices are also 15% 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 3 days, the lowest price for a flight from London Heathrow Airport to Chiang Mai was £305 for a one-way ticket and £488 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between London Heathrow Airport and Chiang Mai, with SkyTeam 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 £815 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 £909 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 401 reviews
8.4Crew
7.7Comfort
7.9Boarding
7.4Food
6.9Entertainment
Airline reviews

HAVING ANNOUNCEMENTS FOR PEOPLE TO BOARD ACCORDING TO GROUP IS ESSENTIAL N ENSURING N CUTTING OF QUEUES, EXCEPT FOR PRIORITY CLASS PASSENGERS ON A SEPARATE Q

8.0 ExcellentHQ, Mar 2026
BKK - SIN
Read more Thai Airways reviews

HAVING ANNOUNCEMENTS FOR PEOPLE TO BOARD ACCORDING TO GROUP IS ESSENTIAL N ENSURING N CUTTING OF QUEUES, EXCEPT FOR PRIORITY CLASS PASSENGERS ON A SEPARATE Q

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

business class is old but still done very well by the team.

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

Good experience although the boarding gate is at the terminal extension hence need to leave lounge to head over earlier.

Thai Royal First is very good. Easy check in , Private room in the first class lounge and escort from ticketing to the plane. Once on board crew was very polite, food was outstanding, and the ride was smooth as silk. Restrooms were especially clean. Great Experience

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.

Need to improve on punctuality. My flight was delayed by 1 hour.

Seats were uncomfortable and the vegetarian meal was awful. Some of the entertainment didn't work.

The crews were very professional and courteous. Pleasant flight and thank you!

They wouldn't let me on the plane. The 3rd party apparently didn't pay for the tickets properly?

Overall experience is good but if the food menu can change to authentic Malaysia food will be good. I.e. Nasi Lemak, Char Kueh Tiew and etc

Surprised that the safety briefing was only conducted in Malay language and no English despite there are foreigners on board. MH should take safety more seriously.

Flights were delayed, Food was good but only 1 meal instead of 2.

Food was good but only 1 meal and 1 pie, instead of 2 meals. Both legs were late.

We are row 11, when the crew came to us, only one meal choice was available.

OK seats comfortable, easy boarding/embarking, excellent connection to domestic Malaysia flight with baggage checked through without customs. Catering especially drinks borderline ok luckily less important aspect

Comfortable seats in economy, managed a few hours sleep in an o night flight but the food was terrible. Surprising as Malaysia airlines has been good in the past. Service was mediocre this time too.

Vast improvement needed in customer service. I couldn’t get the drink of my choice during both meals (i.e. sparking water and Diet Coke). I had used plastic cups falling onto me from the tray. No eye contact when they thank you on the way out signalling an insincere thank you.

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

Unfortunately the flight was cancelled so I never got to go

Food quality and varites were very minimum. Surprised to have no desserts. Business class tickets should have lounge access and seats selection. They should be allowed to board while people with wheel chair, secial assistance and family with childrem.

I liked the crew, the food and the foot space. I did not like the comfort of the seats.

Good flight. There were a few issues with the flat bed. It was some technical issues. Otherwise everything was good

It was great! Kept the time. Provided what was promised

The crew could have been more friendly and could have offered to make the beds. Also, Ethiad should have more vegetarian food options.

The flight was over 1 hour late taking off ,when I arrived in Abu Dhabi ,I missed my connecting flight to Bangkok so I had to wait almost 6 hours for my flight arriving in Bangkok at 6:30 am ,So I missed a whole day of my vacation and my hotel room sat empty so I paid for hotel days that I was not there. In Abu Dhabi there was a woman that worked the desk at transfers that was so professional, courteous , helpful,and may I say absolutely beautiful .she got me food vouchers for my layover and was a very calming presence. Besides that I will never use Etihad again I will pay the Xtra money . I'm sure they won't read or see this but it's my "2 cents" I'll use an airline that respects me and my hard earned dollars

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.

The flight was delayed. The staff made us wait in the room that is too small and it was crowded and with no seats available for waiting. They did not tell us why the delay occurred.

While boarding at PVG, there was a ticket checking at the gate, then there was another ticket checking at the bottom of the escalator, which created quite a dangerous congestion. Not sure which idiot made this absolutely unnecessary arrangement.

While boarding at PVG, there was a ticket checking by the gate, then there was another ticket checking right at the bottom of the escalator, which created quite a dangerous congestion. Don't understand why the duplication?

I was traveling alone with an infant, so the crew was incredibly helpful. Both the international and subsequent domestic flights were impeccable.

Plane was good. But food was bad and air host was so rude. I will never fly with China Eastern again

The flight was delayed by 2 hours, although to their credit they delayed my connecting flight so people could reach it. Also their site is a nightmare to navigate on a phone. Everything else was good.

The ticket was last minute buy so no concerns about the pricing this time, but the crew in general could have been more accommodating, helpful.

CTU-KMG-CNX with 1.5 hr connection at KMG. Doable but just barely bc immigration exit from China is at the last flight leg, here: KMG to CNX. We hauled out of the domestic terminal to reenter at the international departures (luggage checked thru to CNX thankfully). Immigration had only two agents, even though KMG gets a HUGE number of foreigners. It took forever for such a shot line. Then security also took a while, so I just just made the connection. Recommend if you exit China with domestic international transfer, plan for 2+ hrs to avoid a heart attack. Airline personnel don’t suffer if you miss the flight, you do. Plan accordingly.

China Eastern as a member of Sky Alliance airlines should have the same standards overall of their partners, Besides the seats comforts everything else is bellow the standard for a business class travelers. A BIG ISSUE FOR NON-CHINESE PASSENGERS IS THE ABILITY TO CHECK IN ONLINE, by making so difficult or almost impossible there is no chance to get a seat assignment ahead of time then go to the airport and get what is left. THIS IS NOT a SKY TEAM modality.

China Eastern as a member of Sky Alliance airlines should have the same standards overall of their partners, Besides the seats comforts everything else is bellow the standard for a business class travelers.

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

Overall, excellent: check-in, boarding, service, and food. The Business Class seating is a little less private and spacious than the world's premier airlines, but still very good for a long haul flight.

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

Your staff was exceptional. Could teach the other airlines-rules on etiquette, and service. Excellent landings on flights, carried out by your pilots. Only complaint is long delay on return flight in Beijing, onto Vancouver.

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

UA is ok. But check in was a very bad experience

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).

Nothing to complain of, the only reason I am not giving better marks is that I am used to flying with ANA and they are the top.

It's terrible that we can't do online check in because we didn't buy the tickets directly from Air china. It was not explained until I contacted Chatdeal and we could not sit together.

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

Information on your arrival and departure airports