Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Chiang Rai from £720

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CEI
18 Aug — 25 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Chiang Rai

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Chiang Rai
Explore the most affordable flight options available from Heathrow to Chiang Rai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 July 2026.

Mon 31/810:00
LHR
-
CEI
2 stops22h 55m
Multiple Airlines
Mon 7/920:00
CEI
-
LHR
2 stops49h 20m
Multiple Airlines
Deal found 17/7£720
Sat 24/1022:05
LHR
-
CEI
2 stops28h 10m
Multiple Airlines
Sun 1/1113:25
CEI
-
LHR
1 stop24h 15m
Multiple Airlines
Deal found 14/7£818
Fri 28/808:25
LHR
-
CEI
2 stops22h 45m
Multiple Airlines
Fri 4/915:25
CEI
-
LHR
2 stops21h 05m
Multiple Airlines
Deal found 14/7£836
Mon 17/810:00
LHR
-
CEI
2 stops26h 20m
Multiple Airlines
Mon 24/813:40
CEI
-
LHR
2 stops31h 40m
Multiple Airlines
Deal found 18/7£908
Sat 15/821:25
LHR
-
CEI
1 stop33h 45m
Thai Airways
Thu 20/810:10
CEI
-
LHR
1 stop15h 05m
Thai Airways
Deal found 14/7£928
Sat 24/1012:30
LHR
-
CEI
1 stop15h 10m
Thai Airways
Sun 1/1118:55
CEI
-
LHR
1 stop18h 45m
Thai Airways
Deal found 14/7£930
Fri 28/821:25
LHR
-
CEI
1 stop33h 45m
Thai Airways
Fri 4/910:10
CEI
-
LHR
1 stop15h 05m
Thai Airways
Deal found 14/7£943

Find flight deals from Heathrow to Chiang Rai

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chiang Rai (CEI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 19 July 2026.

Round-trip from

£720

Popular in

July

Cheapest in

September

Average price

£1,385
31/8-7/9
  • 31/8-7/9
  • 4 total stops
  • 72h 15m total
  • London to Chiang Rai
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£132 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Chiang Rai that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 July 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Chiang Rai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Mon 31/8

10:00-14:55

2 stops22h 55m

Chiang Rai

Mon 7/9

20:00-15:20

2 stops49h 20m

£720

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Fri 28/8

08:25-13:10

2 stops22h 45m

Chiang Rai

Fri 4/9

15:25-06:30

2 stops21h 05m

£836

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Mon 17/8

10:00-18:20

2 stops26h 20m

Chiang Rai

Mon 24/8

13:40-15:20

2 stops31h 40m

£908

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sat 15/8

21:25-13:10

1 stop33h 45m

Chiang Rai

Thu 20/8

10:10-19:15

1 stop15h 05m

£928

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sat 24/10

12:30-09:40

1 stop15h 10m

Chiang Rai

Sun 1/11

18:55-06:40

1 stop18h 45m

£930

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sat 15/8

14:45-18:20

2 stops21h 35m

Chiang Rai

Thu 20/8

10:10-19:15

1 stop15h 05m

£944
Fastest return journey

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Mon 17/8

21:25-18:20

1 stop14h 55m

Chiang Rai

Mon 24/8

18:55-07:15

1 stop18h 20m

£945

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sat 24/10

22:40-13:55

2 stops33h 15m

Chiang Rai

Sun 1/11

14:25-16:20

2 stops32h 55m

£1,416

Flights are sorted by cheapest return flights first.

Deals found on 17/7

Sorted by cheapest first

Best time to book a flight from Heathrow to Chiang Rai

Have a flexible travel schedule? Discover the best time to fly to Chiang Rai from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Chiang Rai

Get insights into the airlines that provide service to Chiang Rai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Rai. Reviews last updated 19 July 2026.
Check out reviews from past customers who have flown with Thai Airways from London Heathrow Airport to Chiang Rai to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Thai Airways
7.9
Good
409 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.4

Comfort

7.7

Crew

8.4

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Thai Airways
7.9
Good
409 reviews
Thai Airways
7.9
Good
409 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.4

Comfort

7.7

Crew

8.4

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Chiang Rai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Chiang Rai from London Heathrow?

    Chiang Rai (CEI), located 4.5 mi from the city center, is the airport you fly into when you book flights from London Heathrow to Chiang Rai. 1 airline have flights to Chiang Rai from London Heathrow on a regular basis. Booking flights from London Heathrow to Chiang Rai should not be difficult; the airport handles an average of 0 inbound flights from London Heathrow per day.

  • What is the cheapest airline to fly from London Heathrow Airport to Chiang Rai round-trip?

    Currently priced at £778, Thai Airways will fly you from London Heathrow Airport to Chiang Rai and back. In addition to Thai Airways, many other airlines offer competitively priced options for your trip. Users have found that Thai Airways is 25% cheaper than the other options available to this destination.

  • Can I find deals for flights from Heathrow to Chiang Rai that include hotel bookings?

    Yes. In addition to deals on Heathrow to Chiang Rai flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Chiang Rai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Chiang Rai.

  • Can I find deals for business class flights from Heathrow to Chiang Rai?

    Yes. Cheapflights offers flight deals from Heathrow to Chiang Rai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Heathrow to Chiang Rai

Discover the top airline that operate flights from Heathrow to Chiang Rai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£778Average£1,022FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Chiang Rai?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Chiang Rai. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Chiang Rai?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Chiang Rai for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Chiang Rai with no change fees?

Certainly. Search results for flights to Chiang Rai from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Chiang Rai become cheaper?

Yes! Start tracking prices for Heathrow to Chiang Rai flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.