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

The distance from Chiang Mai International Airport (CNX) to London Heathrow Airport (LHR) 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.

---

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

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

Estimated flight time from Chiang Mai International Airport, Chiang Mai, Thailand to London Heathrow Airport, London, United Kingdom 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 • CNX - LHR

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

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

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

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

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

Time Difference Between the Airports • CNX - LHR

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

Location	Local Time
Chiang Mai (Thailand)	2025-12-14, 01:52:08 +07
London (United Kingdom)	2025-12-13, 18:52:08 GMT

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

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

Destination

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