Distance From London Heathrow Airport to Chiang Mai International Airport, LHR - CNX Distance

The distance from London Heathrow Airport (LHR) to Chiang Mai International Airport (CNX) is 5602 miles or 9015 kilometers or 4865 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from London ( United Kingdom ) to Chiang Mai ( Thailand )?

A one-way nonstop (direct) flight between London and Chiang Mai takes around 12 hours 52 minutes.

Estimated flight time from London Heathrow Airport, London, United Kingdom to Chiang Mai International Airport, Chiang Mai, Thailand is 12 hours 52 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • LHR - CNX

Kilometers		9015 km
Statute Miles		5602 miles
Nautical Miles		4865 nm
Avg. Time of Flight		12 hours 52 minutes

London Heathrow Airport to Chiang Mai International Airport Flight Route Map - LHR to CNX Flight Path

Location of London Heathrow Airport & Chiang Mai International Airport is given below.
Click the map to view London to Chiang Mai nonstop flight path and travel direction.

Click to see flight route on Google Map between London, United Kingdom and Chiang Mai, Thailand. .

Nonstop flight route between London, United Kingdom and Chiang Mai, Thailand.

Time Difference Between the Airports • LHR - CNX

Time difference between London (United Kingdom) and Chiang Mai (Thailand) is 7 Hours.
Chiang Mai time is 7 Hours ahead of London.

Location	Local Time
London (United Kingdom)	2025-03-20, 17:43:03 GMT
Chiang Mai (Thailand)	2025-03-21, 00:43:03 +07

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

London Heathrow Airport (LHR / EGLL) London, United Kingdom

Destination

Chiang Mai International Airport (CNX / VTCC) Chiang Mai, Thailand