Distance From Antonio B. Won Pat International Airport to Ontario International Airport, GUM - ONT Distance

The distance from Antonio B. Won Pat International Airport (GUM) to Ontario International Airport (ONT) is 6124 miles or 9855 kilometers or 5318 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 Hagåtña ( Guam ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Hagåtña and Ontario takes around 14 hours 4 minutes.

Estimated flight time from Antonio B. Won Pat International Airport, Hagåtña, Guam to Ontario International Airport, Ontario, United States is 14 hours 4 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 • GUM - ONT

Kilometers		9855 km
Statute Miles		6124 miles
Nautical Miles		5318 nm
Avg. Time of Flight		14 hours 4 minutes

Antonio B. Won Pat International Airport to Ontario International Airport Flight Route Map - GUM to ONT Flight Path

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

Click to see flight route on Google Map between Hagåtña, Guam and Ontario, United States. .

Nonstop flight route between Hagåtña, Guam and Ontario, United States.

Time Difference Between the Airports • GUM - ONT

Time difference between Hagåtña (Guam) and Ontario (United States) is 18 Hours.
Ontario time is 18 Hours behind Hagåtña.

Location	Local Time
Hagåtña (Guam)	2025-12-17, 03:38:39 ChST
Ontario (United States)	2025-12-16, 09:38:39 PST

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

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

Destination

Ontario International Airport (ONT / KONT) Ontario, United States