Distance From U-Tapao International Airport to St Louis Lambert International Airport, UTP - STL Distance

The distance from U-Tapao International Airport (UTP) to St Louis Lambert International Airport (STL) is 8808 miles or 14175 kilometers or 7649 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 Rayong ( Thailand ) to St Louis ( United States )?

A one-way nonstop (direct) flight between Rayong and St Louis takes around 20 hours 15 minutes.

Estimated flight time from U-Tapao International Airport, Rayong, Thailand to St Louis Lambert International Airport, St Louis, United States is 20 hours 15 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 • UTP - STL

Kilometers		14175 km
Statute Miles		8808 miles
Nautical Miles		7649 nm
Avg. Time of Flight		20 hours 15 minutes

U-Tapao International Airport to St Louis Lambert International Airport Flight Route Map - UTP to STL Flight Path

Location of U-Tapao International Airport & St Louis Lambert International Airport is given below.
Click the map to view Rayong to St Louis nonstop flight path and travel direction.

Click to see flight route on Google Map between Rayong, Thailand and St Louis, United States. .

Nonstop flight route between Rayong, Thailand and St Louis, United States.

Time Difference Between the Airports • UTP - STL

Time difference between Rayong (Thailand) and St Louis (United States) is 12 Hours.
St Louis time is 12 Hours behind Rayong.

Location	Local Time
Rayong (Thailand)	2025-12-15, 22:41:15 +07
St Louis (United States)	2025-12-15, 10:41:15 EST

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

U-Tapao International Airport (UTP / VTBU) Rayong, Thailand

Destination

St Louis Lambert International Airport (STL / KSTL) St Louis, United States