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

A quick flight from Chiang Rai to London Heathrow Airport can take about 23h 15m. Thai Airways provides one of the quickest options available for as low as £978. The distance between Chiang Rai and London Heathrow Airport is about 5571 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What is the cheapest month to book a flight from Chiang Rai to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Chiang Rai to London Heathrow Airport (average of £112). Flying from Chiang Rai to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from CEI to LHR?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chiang Rai to London Heathrow Airport as you normally would.

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

If you book a flight to London Heathrow from Chiang Rai, you will be flying from Chiang Rai, which is the city’s only airport. Chiang Rai (CEI) is located 4.5 mi from the center of Chiang Rai. There are 0 flights from Chiang Rai to London Heathrow per day from 0 different airlines.

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

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

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

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

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

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

£978+ Flights from Chiang Rai to London Heathrow Airport

Cheap flight deals from Chiang Rai to Heathrow

Round-trip from	£978

Thai Airways
5/3-7/3
2 total stops
42h 20m total
Chiang Rai to London

Search Deals

Find flight deals from Chiang Rai to Heathrow

Best flights from Chiang Rai to Heathrow
Discover carefully curated flight deals from Chiang Rai to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 9月 2025.

週四 5/314:25CEI - LHR

1 stop23h 15mThai Airways

週六 7/311:50LHR - CEI

1 stop19h 05mThai Airways

Deal found 15/9£978

週四 5/318:55CEI - LHR

2 stops27h 55mLufthansa

週六 7/320:15LHR - CEI

2 stops39h 05mLufthansa

Deal found 15/9£1,017

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Chiang RaiLondon

CEI - LHR

CEILHR

Chiang Rai

週四 5/3

14:25-06:40

1 stop23h 15m

London Heathrow

週六 7/3

11:50-13:55

1 stop19h 05m

£978

Chiang RaiLondon

CEI - LHR

CEILHR

Chiang Rai

週四 5/3

18:55-15:50

2 stops27h 55m

London Heathrow

週六 7/3

20:15-18:20

2 stops39h 05m

£1,017

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Best time to book a flight from Chiang Rai to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Chiang Rai 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.

Related info for your journey

What airport do you fly from for flights from Chiang Rai to London Heathrow?
If you book a flight to London Heathrow from Chiang Rai, you will be flying from Chiang Rai, which is the city’s only airport. Chiang Rai (CEI) is located 4.5 mi from the center of Chiang Rai. There are 0 flights from Chiang Rai to London Heathrow per day from 0 different airlines.
How long is the flight from Chiang Rai to London Heathrow Airport?
A quick flight from Chiang Rai to London Heathrow Airport can take about 23h 15m. Thai Airways provides one of the quickest options available for as low as £978. The distance between Chiang Rai and London Heathrow Airport is about 5571 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
Can I find deals for flights from Chiang Rai to Heathrow that include hotel bookings?
Yes. In addition to deals on Chiang Rai to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Chiang Rai to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chiang Rai to Heathrow.
Can I find deals for business class flights from Chiang Rai to Heathrow?
Yes. Cheapflights offers flight deals from Chiang Rai to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chiang Rai to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Chiang Rai to London Heathrow Airport (average of £112). Flying from Chiang Rai to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Milton Keynes

Croydon

Hounslow

Slough

Gatwick

Northampton

Luton

Deal

Wembley

Ilford

Crawley

Hayes

Watford

Winchester

Chichester

Ipswich

Swindon

Dartford

Guildford

Brentford

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Chiang Rai today with Cheapflights!

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

Millions of users choose and trust Cheapflights to book the best flight deals from Chiang Rai to Heathrow 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 Chiang Rai to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Chiang Rai to Heathrow flexibly with Cheapflights today.

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

Of course! You can now track prices for flights from Chiang Rai to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price 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.

Cheap flights from Chiang Rai to London Heathrow Airport from £978

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.