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Cheap flights from London Heathrow Airport to Chiang Rai from £574

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CEI
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap 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 17 September 2025.

Round-trip from

£565

Popular in

December

Cheapest in

June

Average price

£864
19/2-12/3
  • 19/2-12/3
  • 4 total stops
  • 53h 25m total
  • London to Chiang Rai
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Heathrow to Chiang Rai

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 17 September 2025.

Sun 2/1113:30LHR - CEI
2 stops22h 55mMultiple Airlines
Wed 12/1108:30CEI - LHR
2 stops28h 05mMultiple Airlines
Deal found 16/9£662
Mon 10/1106:35LHR - CEI
2 stops28h 45mMultiple Airlines
Wed 27/518:55CEI - LHR
2 stops19h 25mMultiple Airlines
Deal found 16/9£842
Mon 10/1111:50LHR - CEI
1 stop19h 05mThai Airways
Wed 27/518:55CEI - LHR
1 stop18h 20mThai Airways
Deal found 15/9£1,268

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 17 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chiang Rai that are best for you.

Fly from

Heathrow

Fly to

Chiang Rai

Route

Depart

Return

Price

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Tue 17/2

13:55-15:55

2 stops19h 00m

Chiang Rai

Tue 10/3

08:40-06:40

2 stops29h 00m

£574

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Wed 11/2

14:50-18:20

2 stops20h 30m

Chiang Rai

Wed 11/3

10:15-21:40

2 stops18h 25m

£647

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sun 2/11

13:30-19:25

2 stops22h 55m

Chiang Rai

Wed 12/11

08:30-05:35

2 stops28h 05m

£662

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Sat 21/2

14:50-18:20

2 stops20h 30m

Chiang Rai

Sat 21/3

10:15-21:40

2 stops18h 25m

£703

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Tue 24/2

18:05-08:10

2 stops31h 05m

Chiang Rai

Tue 24/3

15:20-06:40

1 stop22h 20m

£753

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Thu 12/2

11:50-18:20

1 stop23h 30m

Chiang Rai

Thu 12/3

10:15-19:35

1 stop16h 20m

£775

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Tue 10/2

11:50-13:55

1 stop19h 05m

Chiang Rai

Wed 11/3

18:55-19:35

1 stop31h 40m

£777

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Thu 12/2

11:50-18:20

1 stop23h 30m

Chiang Rai

Tue 10/3

14:25-19:35

1 stop36h 10m

£777

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Wed 11/2

11:50-09:40

1 stop14h 50m

Chiang Rai

Tue 10/3

18:55-19:35

1 stop31h 40m

£778

LondonChiang Rai

LHR - CEI

LHRCEI

London Heathrow

Wed 11/2

11:50-09:40

1 stop14h 50m

Chiang Rai

Wed 11/3

14:25-19:35

1 stop36h 10m

£778

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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 17 September 2025.
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
7.8
Good
350 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.3

Overall

7.8

Boarding

7.9

Food

7.3

Reviews

1 / 18
10.0
Excellent

Joe,Jun 2025

BKK - TPE

The flight was very comfortable, and I really appreciated that each seat had an electric outlet to charge devices. The staff was great.
Thai Airways
7.8
Good
350 reviews
Thai Airways
7.8
Good
350 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.3

Overall

7.8

Boarding

7.9

Food

7.3

Reviews

1 / 18
10.0
Excellent

Joe,Jun 2025

BKK - TPE

The flight was very comfortable, and I really appreciated that each seat had an electric outlet to charge devices. The staff was great.

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 £724, 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 15% 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

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Alternative routes for Heathrow to Chiang Rai

See prices for flight routes from nearby airports that may be better suited for you.
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Southend to Krabi flights
Luton to Ko Samui flights
Gatwick to Surat Thani flights
Gatwick to Trat flights
Stansted to Trat flights

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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£724Average£793FlexibilityNo 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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