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Cheap flights from London Heathrow Airport to Chiang Rai from £355

LHR — CEI
1 Nov — 8 Nov1
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

Wed 11/1115:30 -
2 stops19h 50m
Wed 18/1110:15 -
2 stops27h 10m
Deal found 27/9£725
Wed 30/908:25 -
2 stops22h 45m
Wed 14/1018:55 -
2 stops25h 30m
Deal found 27/9£780
Fri 11/1211:50 -
1 stop23h 30m
Mon 21/1210:15 -
1 stop16h 20m
Deal found 27/9£941
Fri 11/1206:30 -
2 stops21h 15m
Mon 21/1208:30 -
1 stop18h 05m
Deal found 27/9£1,010

Find flight deals from Heathrow to Chiang Rai

Round-trip from

£725

One-way from

£355
11/11-18/11
  • 11/11-18/11
  • 4 total stops
  • 47h 00m total
  • London to Chiang Rai
Search Deals
19/2-31/12
  • 19/2-31/12
  • 2 total stops
  • 39h 15m total
  • London to Chiang Rai
Search Deals

Cheapflights Fare Finder

 
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
Fastest return journey

LondonChiang Rai

LHR London Heathrow - CEI Chiang Rai

LHRCEI

London Heathrow

Fri 19/2

21:10-19:25

2 stops39h 15m

Chiang Rai

Wed 31/12

00:00-18:00

Nonstop0h 00m

£355

LondonChiang Rai

LHR London Heathrow - CEI Chiang Rai

LHRCEI

London Heathrow

Wed 11/11

15:30-18:20

2 stops19h 50m

Chiang Rai

Wed 18/11

10:15-06:25

2 stops27h 10m

£725

LondonChiang Rai

LHR London Heathrow - CEI Chiang Rai

LHRCEI

London Heathrow

Fri 11/12

10:30-14:50

2 stops21h 20m

Chiang Rai

Mon 21/12

20:00-09:40

2 stops44h 40m

£842

LondonChiang Rai

LHR London Heathrow - CEI Chiang Rai

LHRCEI

London Heathrow

Fri 11/12

11:50-18:20

1 stop23h 30m

Chiang Rai

Mon 21/12

10:15-19:35

1 stop16h 20m

£941

Flights are sorted by cheapest return flights first.

Deals found on 1/10

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

Reviews of airlines servicing Chiang Rai

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
425 reviews
Check prices

Crew

8.5

Food

7.5

Boarding

8.0

Entertainment

6.9

Overall

7.9

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Thayawat,Sept 2026

SIN - BKK

Entertainment system was improved. I could not get my preferred Isle seat this time.
Thai Airways
7.9
Good
425 reviews
Thai Airways
7.9
Good
425 reviews
Check prices

Crew

8.5

Food

7.5

Boarding

8.0

Entertainment

6.9

Overall

7.9

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Thayawat,Sept 2026

SIN - BKK

Entertainment system was improved. I could not get my preferred Isle seat this time.

Related info for your journey

  • 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.

  • How long is the flight from London Heathrow Airport to Chiang Rai?

    There are many flights that can get you from London Heathrow Airport to Chiang Rai in 23h 30m. Fly via Thai Airways to get the fastest option. The distance from London Heathrow Airport to Chiang Rai is about 5571 mi.

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

    Currently priced at £926, 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.

  • 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

Top airline flying from Heathrow to Chiang Rai

AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£926Average£1,233FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

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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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