LHR - CNX

Find cheap flights from London to Chiang Mai - Compare and Save

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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Chiang Mai, as well as popular online travel agencies
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Everything you should know

Nonstop flights
Not available
There are currently no direct flights between London and Chiang Mai. You'll need at least 1 connection.
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Top layover airports
Cheapest • Avg $630 (round-trip)
Shortest trip • 14h 14m (one-way)
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When to travel
Cheapest • 23% price drop
Most popular
Good to know
Good to know
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KAYAK searches 100s 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 London to Chiang Mai (LHR-CNX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London 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 round-trip flight deals from London to Chiang Mai

Multiple Airlines Logo
LHR
-
CNX
5598 mimulti-stop
Multiple Airlines Logo
CNX
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LHR
5598 mimulti-stop
Multiple Airlines
Booking Insights

KAYAK's insights & trends for London to Chiang Mai flights

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

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 $763 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $1,446 and $1,250 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

Low seasonAugust
Best time to beat the crowds but there is an average 23% increase in price.
Most popular time to fly and prices are also 21% lower on average.

When to book flights from London to Chiang Mai

Are your dates flexible? Find out the best times to travel from London to Chiang Mai based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 to Chiang Mai flights

  • Do I need a passport to fly between London and Chiang Mai?

    Yes, you'll most likely have to show a valid passport before boarding the plane in London and on arrival in Chiang Mai.

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

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

  • How does KAYAK find such low prices on flights from London 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 to Chiang Mai.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London 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 is likely to change within 7 days, so travelers know whether to wait or book now.

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chiang Mai with an airline and back to London with another airline. Booking your flights between London and CNX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from London 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 London 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.
7.3
Etihad AirwaysOverall score based on 1469 reviews
7.2Food
7.3Comfort
7.6Boarding
7.2Entertainment
7.8Crew
Airline reviews

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.

2.0 MediocreRBLX, Apr 2026
LHR - AUH
Read more Etihad Airways reviews

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

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

Information on your arrival and departure airports