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.

£290+ Cheap Flights from Chiang Rai to London Heathrow Airport

Cheap flight deals from Chiang Rai to Heathrow

Enter your travel dates to find the best prices.

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Cheapest flights from Chiang Rai to Heathrow
Explore the most affordable flight options available from Chiang Rai to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Wed 11/1110:15 -

2 stops27h 20m

Fri 13/1121:40 -

2 stops37h 40m

Deal found 30/10£1,034

Wed 11/1114:25 -

1 stop35h 40m

Fri 13/1121:20 -

1 stop33h 35m

Deal found 3/11£1,053

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

Cheapest return flight

Chiang RaiLondon

CEI Chiang Rai - LHR London Heathrow

CEILHR

Chiang Rai

Thu 1/4

17:55-20:00

2 stops32h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£299

Chiang RaiLondon

CEI Chiang Rai - LHR London Heathrow

CEILHR

Chiang Rai

Mon 5/4

15:25-20:15

3 stops34h 50m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£397

Chiang RaiLondon

CEI Chiang Rai - LHR London Heathrow

CEILHR

Chiang Rai

Thu 1/4

18:55-07:15

1 stop18h 20m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£444

Fastest return journey

Chiang RaiLondon

CEI Chiang Rai - LHR London Heathrow

CEILHR

Chiang Rai

Mon 5/4

10:10-19:15

1 stop15h 05m

London Heathrow

Wed 31/12

00:00-06:00

Nonstop0h 00m

£444

Flights are sorted by cheapest return flights first.

Deals found on 2/11

Sorted by cheapest first

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.

CEI-LHR

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.
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.

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

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Cheap flights from Chiang Rai to London Heathrow Airport from £290

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Chiang Rai to Heathrow

Cheapest flights from Chiang Rai to HeathrowExplore the most affordable flight options available from Chiang Rai to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Explore the most affordable flight options available from Chiang Rai to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Last-minute flights from Chiang Rai to HeathrowDiscover last-minute flight deals from Chiang Rai to Heathrow. Data last updated 4 November 2026 and is based on user searches.

Discover last-minute flight deals from Chiang Rai to Heathrow. Data last updated 4 November 2026 and is based on user searches.

One-way flights from Chiang Rai to HeathrowSearch for one-way flight options from Chiang Rai to Heathrow. Find affordable one-way fares based on user searches. Data last updated 4 November 2026.

Search for one-way flight options from Chiang Rai to Heathrow. Find affordable one-way fares based on user searches. Data last updated 4 November 2026.

Cheapflights Fare Finder

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

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.

Related info for your journey

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

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

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

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

Travelling to a place near London Heathrow Airport?

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.

Alternative routes for Chiang Rai to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

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Search flights from Chiang Rai to Heathrow by cabin class

Find flights from Chiang Rai to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 4 November 2026.

Chiang Rai and Heathrow flights

Browse other Chiang Rai and Heathrow flight options. Last updated on 4 November 2026.

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

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

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

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

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Cheapest flights from Chiang Rai to Heathrow
Explore the most affordable flight options available from Chiang Rai to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2026.

Last-minute flights from Chiang Rai to Heathrow
Discover last-minute flight deals from Chiang Rai to Heathrow. Data last updated 4 November 2026 and is based on user searches.

One-way flights from Chiang Rai to Heathrow
Search for one-way flight options from Chiang Rai to Heathrow. Find affordable one-way fares based on user searches. Data last updated 4 November 2026.