Distance From Prevost Airport to Chiang Mai International Airport

The distance from Prevost Airport () to Chiang Mai International Airport (CNX) is 7619 miles or 12261 kilometers or 6616 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 Lambert ( United States ) to Chiang Mai ( Thailand )?

A one-way nonstop (direct) flight between Lambert and Chiang Mai takes around 17 hours 30 minutes.

Estimated flight time from Prevost Airport, Lambert, United States to Chiang Mai International Airport, Chiang Mai, Thailand is 17 hours 30 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

Kilometers		12261 km
Statute Miles		7619 miles
Nautical Miles		6616 nm
Avg. Time of Flight		17 hours 30 minutes

Prevost Airport to Chiang Mai International Airport Flight Route Map - to CNX Flight Path

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

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

Nonstop flight route between Lambert, United States and Chiang Mai, Thailand.

Time Difference Between the Airports • - CNX

Time difference between Lambert (United States) and Chiang Mai (Thailand) is 12 Hours.
Chiang Mai time is 12 Hours ahead of Lambert.

Location	Local Time
Lambert (United States)	2026-05-04, 21:08:58 CDT
Chiang Mai (Thailand)	2026-05-05, 09:08:58 +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

Prevost Airport ( / 20MT) Lambert, United States

Destination

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