LHR - CEI

£740 Find Cheap Flights from London Heathrow Airport to Chiang Rai – Compare and Save

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Chiang Rai departing on 18/11. 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 Rai

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

Cheapest return fare
£740
Typical prices: £1,044-£940
Multiple Airlines
Wed 18/11Sun 6/12
LHR - CEI • 2 stops
Cheapest one-way flight
£1,359
Multiple Airlines
Mon 22/6
LHR - CEI • 3 stops
Direct flights
Not available
There are currently no direct flights between Heathrow and Chiang Rai. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
June
Cheapest • 100% price drop
October
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 Rai!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Chiang Rai (LHR-CEI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Chiang Rai 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 Rai

Wed, 18 Nov - Sun, 6 Dec
Multiple Airlines Logo
08:35 - 09:40
LHR
-
CEI
18h 05m
2 stops
Multiple Airlines Logo
14:25 - 07:20
CEI
-
LHR
23h 55m
2 stops
£740Multiple Airlines
Sun, 15 Nov - Sun, 6 Dec
Multiple Airlines Logo
08:05 - 09:40
LHR
-
CEI
18h 35m
2 stops
Multiple Airlines Logo
14:25 - 07:20
CEI
-
LHR
23h 55m
2 stops
£768Multiple Airlines
Fri, 26 Jun - Tue, 30 Jun
Multiple Airlines Logo
16:00 - 18:20
LHR
-
CEI
20h 20m
2 stops
Multiple Airlines Logo
18:55 - 13:15
CEI
-
LHR
24h 20m
2 stops
£777Multiple Airlines
Wed, 1 Jul - Sat, 4 Jul
Multiple Airlines Logo
08:25 - 13:10
LHR
-
CEI
22h 45m
2 stops
Multiple Airlines Logo
18:55 - 13:15
CEI
-
LHR
24h 20m
2 stops
£880Multiple Airlines
Wed, 18 Nov - Sun, 6 Dec
Multiple Airlines Logo
21:20 - 13:55
LHR
-
CEI
33h 35m
1 stop
Multiple Airlines Logo
18:55 - 19:05
CEI
-
LHR
31h 10m
1 stop
£921Multiple Airlines
Sun, 15 Nov - Sun, 6 Dec
Multiple Airlines Logo
21:20 - 09:40
LHR
-
CEI
29h 20m
1 stop
Multiple Airlines Logo
18:55 - 19:05
CEI
-
LHR
31h 10m
1 stop
£930Multiple Airlines
Tue, 17 Nov - Sat, 5 Dec
Multiple Airlines Logo
07:05 - 15:55
LHR
-
CEI
25h 50m
2 stops
Multiple Airlines Logo
08:30 - 19:05
CEI
-
LHR
17h 35m
1 stop
£931Multiple Airlines
Tue, 17 Nov - Fri, 4 Dec
Multiple Airlines Logo
09:55 - 15:55
LHR
-
CEI
23h 00m
2 stops
Multiple Airlines Logo
08:40 - 19:05
CEI
-
LHR
17h 25m
1 stop
£959Multiple Airlines
Sat, 14 Nov - Sat, 5 Dec
Multiple Airlines Logo
10:35 - 15:55
LHR
-
CEI
22h 20m
2 stops
Multiple Airlines Logo
08:30 - 19:05
CEI
-
LHR
17h 35m
1 stop
£972Multiple Airlines
Sat, 14 Nov - Thu, 3 Dec
Multiple Airlines Logo
10:35 - 15:55
LHR
-
CEI
22h 20m
2 stops
Multiple Airlines Logo
08:30 - 19:05
CEI
-
LHR
17h 35m
1 stop
£976Multiple Airlines
Booking Insights

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

Get data-powered insights and trends into flights from Heathrow to Chiang Rai 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 Rai?

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 Rai, 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 Rai is June, where tickets cost £0 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is £1,225 and £1,185 respectively.

Find deals

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

Low seasonSeptember
Cheapest flight£740
Best time to beat the crowds (32% less expensive on average)
Most popular time to fly (14% more expensive on average)
Flight from London Heathrow Airport to Chiang Rai

When to book flights from Heathrow to Chiang Rai

Are your dates flexible? Find out the best times to travel from Heathrow to Chiang Rai 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 Rai flights

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

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Chiang Rai was £1,359 for a one-way ticket and £740 for a return.

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

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

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

    Star Alliance is the only airline alliance operating flights between London Heathrow Airport and Chiang Rai.

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

    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 Rai.

  • 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 Rai?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chiang Rai 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 Rai?

    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 Rai 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 Rai?

    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 Rai 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 airline flying from Heathrow to Chiang Rai

 
See real verified KAYAK customer reviews for airlines flying from London to Chiang Rai. 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 Rai? 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 406 reviews
7.7Comfort
8.4Crew
6.9Entertainment
7.9Boarding
7.4Food
Airline reviews

Gate and boarding processes were handled smoothly and efficiently. Both (connecting) flights departed and arrived on time. The cabin crew seemed anxious and a bit stressed/rushed. Food service was OK, but the hot food dishes were poor quality.

8.0 ExcellentPeter, May 2026
KTI - LHR
Read more Thai Airways reviews

Gate and boarding processes were handled smoothly and efficiently. Both (connecting) flights departed and arrived on time. The cabin crew seemed anxious and a bit stressed/rushed. Food service was OK, but the hot food dishes were poor quality.

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.

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

Information on your arrival and departure airports

London Heathrow Airport (LHR)
Chiang Rai (CEI)