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Cheap flights from London Heathrow Airport to Chiang Rai from £363

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CEI
9 Jul — 16 Jul1
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 9 June 2026.

Mon 6/708:05
LHR
-
CEI
2 stops28h 15m
Multiple Airlines
Mon 13/718:55
CEI
-
LHR
2 stops24h 20m
Multiple Airlines
Deal found 6/6£729
Wed 18/1108:35
LHR
-
CEI
2 stops18h 05m
Multiple Airlines
Sun 6/1214:25
CEI
-
LHR
2 stops23h 55m
Multiple Airlines
Deal found 9/6£742
Tue 7/708:25
LHR
-
CEI
2 stops22h 45m
Multiple Airlines
Mon 13/718:55
CEI
-
LHR
2 stops24h 20m
Multiple Airlines
Deal found 5/6£829
Mon 6/715:05
LHR
-
CEI
2 stops21h 15m
Multiple Airlines
Sun 12/718:55
CEI
-
LHR
2 stops24h 20m
Multiple Airlines
Deal found 5/6£851
Wed 1/708:25
LHR
-
CEI
2 stops22h 45m
Multiple Airlines
Sat 4/718:55
CEI
-
LHR
2 stops24h 20m
Multiple Airlines
Deal found 8/6£882
Tue 7/714:45
LHR
-
CEI
2 stops21h 35m
Multiple Airlines
Sun 12/713:40
CEI
-
LHR
2 stops29h 35m
Multiple Airlines
Deal found 5/6£890
Mon 6/722:00
LHR
-
CEI
3 stops39h 25m
Multiple Airlines
Wed 15/720:00
CEI
-
LHR
1 stop29h 20m
Multiple Airlines
Deal found 5/6£914
Thu 9/708:25
LHR
-
CEI
2 stops22h 45m
Multiple Airlines
Wed 5/818:55
CEI
-
LHR
2 stops43h 05m
Multiple Airlines
Deal found 5/6£964
Wed 5/814:45
LHR
-
CEI
2 stops21h 35m
Multiple Airlines
Wed 19/810:10
CEI
-
LHR
2 stops26h 50m
Multiple Airlines
Deal found 5/6£993

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 9 June 2026.

Round-trip from

£729

One-way from

£363

Popular in

April

Cheapest in

September
6/7-13/7
  • 6/7-13/7
  • 4 total stops
  • 52h 35m total
  • London to Chiang Rai
Search Deals
30/8
  • 30/8
  • 2 total stops
  • 28h 35m total
  • London to Chiang Rai
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£3 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£25 potential savings vs. average return price).
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 9 June 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 6/7

08:05-18:20

2 stops28h 15m

Chiang Rai

Mon 13/7

18:55-13:15

2 stops24h 20m

£729

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Wed 18/11

21:20-13:55

1 stop33h 35m

Chiang Rai

Sun 6/12

18:55-19:05

1 stop31h 10m

£923

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Wed 1/7

21:35-18:20

1 stop14h 45m

Chiang Rai

Sat 4/7

13:40-17:45

2 stops34h 05m

£1,028
Fastest return journey

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sun 5/7

21:35-19:25

1 stop15h 50m

Chiang Rai

Thu 16/7

08:25-19:20

1 stop16h 55m

£1,133

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Tue 7/7

21:35-19:25

1 stop15h 50m

Chiang Rai

Sat 11/7

08:25-19:20

1 stop16h 55m

£1,187

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Wed 8/7

21:25-18:20

1 stop14h 55m

Chiang Rai

Sun 12/7

10:10-07:00

2 stops26h 50m

£1,249

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Thu 9/7

21:25-18:20

1 stop14h 55m

Chiang Rai

Sun 12/7

10:10-07:00

2 stops26h 50m

£1,249

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sat 4/7

08:25-14:55

2 stops24h 30m

Chiang Rai

Tue 14/7

08:25-19:20

1 stop16h 55m

£1,389

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Thu 12/11

20:35-08:00

1 stop28h 25m

Chiang Rai

Mon 16/11

19:25-15:20

1 stop26h 55m

£1,584
Cheapest one-way

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sun 30/8

21:20-07:55

2 stops28h 35m

£363

Flights are sorted by cheapest return flights first.

Deals found on 6/6

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 9 June 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
406 reviews
Check prices

Crew

8.4

Entertainment

6.9

Boarding

7.9

Overall

7.9

Comfort

7.7

Food

7.4

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
406 reviews
Thai Airways
7.9
Good
406 reviews
Check prices

Crew

8.4

Entertainment

6.9

Boarding

7.9

Overall

7.9

Comfort

7.7

Food

7.4

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 £777, 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 17% 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£777Average£935FlexibilityNo 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.

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