Distance From Pierce Field to Chiang Mai International Airport

The distance from Pierce Field () to Chiang Mai International Airport (CNX) is 9019 miles or 14514 kilometers or 7832 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 Port O'Connor ( United States ) to Chiang Mai ( Thailand )?

A one-way nonstop (direct) flight between Port O'Connor and Chiang Mai takes around 20 hours 44 minutes.

Estimated flight time from Pierce Field, Port O'Connor, United States to Chiang Mai International Airport, Chiang Mai, Thailand is 20 hours 44 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		14514 km
Statute Miles		9019 miles
Nautical Miles		7832 nm
Avg. Time of Flight		20 hours 44 minutes

Pierce Field to Chiang Mai International Airport Flight Route Map - to CNX Flight Path

Location of Pierce Field & Chiang Mai International Airport is given below.
Click the map to view Port O'Connor to Chiang Mai nonstop flight path and travel direction.

Click to see flight route on Google Map between Port O'Connor, United States and Chiang Mai, Thailand. .

Nonstop flight route between Port O'Connor, United States and Chiang Mai, Thailand.

Time Difference Between the Airports • - CNX

Time difference between Port O'Connor (United States) and Chiang Mai (Thailand) is 13 Hours.
Chiang Mai time is 13 Hours ahead of Port O'Connor.

Location	Local Time
Port O'Connor (United States)	2025-12-16, 16:20:29 CST
Chiang Mai (Thailand)	2025-12-17, 05:20:29 +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

Pierce Field ( / 72TA) Port O'Connor, United States

Destination

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