Distance From St Louis Regional Airport to Antonio B. Won Pat International Airport, ALN - GUM Distance

The distance from St Louis Regional Airport (ALN) to Antonio B. Won Pat International Airport (GUM) is 7381 miles or 11878 kilometers or 6410 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 Alton/St Louis ( United States ) to Hagåtña ( Guam )?

A one-way nonstop (direct) flight between Alton/St Louis and Hagåtña takes around 16 hours 58 minutes.

Estimated flight time from St Louis Regional Airport, Alton/St Louis, United States to Antonio B. Won Pat International Airport, Hagåtña, Guam is 16 hours 58 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 • ALN - GUM

Kilometers		11878 km
Statute Miles		7381 miles
Nautical Miles		6410 nm
Avg. Time of Flight		16 hours 58 minutes

St Louis Regional Airport to Antonio B. Won Pat International Airport Flight Route Map - ALN to GUM Flight Path

Location of St Louis Regional Airport & Antonio B. Won Pat International Airport is given below.
Click the map to view Alton/St Louis to Hagåtña nonstop flight path and travel direction.

Click to see flight route on Google Map between Alton/St Louis, United States and Hagåtña, Guam. .

Nonstop flight route between Alton/St Louis, United States and Hagåtña, Guam.

Time Difference Between the Airports • ALN - GUM

Time difference between Alton/St Louis (United States) and Hagåtña (Guam) is 14 Hours.
Hagåtña time is 14 Hours ahead of Alton/St Louis.

Location	Local Time
Alton/St Louis (United States)	2026-08-02, 10:39:21 EDT
Hagåtña (Guam)	2026-08-03, 00:39:21 ChST

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

St Louis Regional Airport (ALN / KALN) Alton/St Louis, United States

Destination

Antonio B. Won Pat International Airport (GUM / PGUM) Hagåtña, Guam