Distance From Ascension Seton Smithville Regional Hospital Heliport to Chiang Mai International Airport

The distance from Ascension Seton Smithville Regional Hospital Heliport () to Chiang Mai International Airport (CNX) is 8901 miles or 14324 kilometers or 7730 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 Smithville ( United States ) to Chiang Mai ( Thailand )?

A one-way nonstop (direct) flight between Smithville and Chiang Mai takes around 20 hours 27 minutes.

Estimated flight time from Ascension Seton Smithville Regional Hospital Heliport, Smithville, United States to Chiang Mai International Airport, Chiang Mai, Thailand is 20 hours 27 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		14324 km
Statute Miles		8901 miles
Nautical Miles		7730 nm
Avg. Time of Flight		20 hours 27 minutes

Ascension Seton Smithville Regional Hospital Heliport to Chiang Mai International Airport Flight Route Map - to CNX Flight Path

Location of Ascension Seton Smithville Regional Hospital Heliport & Chiang Mai International Airport is given below.
Click the map to view Smithville to Chiang Mai nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • - CNX

Time difference between Smithville (United States) and Chiang Mai (Thailand) is 13 Hours.
Chiang Mai time is 13 Hours ahead of Smithville.

Location	Local Time
Smithville (United States)	2026-05-07, 08:30:52 MDT
Chiang Mai (Thailand)	2026-05-07, 21:30:52 +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

Ascension Seton Smithville Regional Hospital Heliport ( / TX54) Smithville, United States

Destination

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