Distance From Stephens Island Seaplane Base to Ontario International Airport, STF - ONT Distance

The distance from Stephens Island Seaplane Base (STF) to Ontario International Airport (ONT) is 7089 miles or 11409 kilometers or 6157 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 Stephens Island ( Australia ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Stephens Island and Ontario takes around 16 hours 17 minutes.

Estimated flight time from Stephens Island Seaplane Base, Stephens Island, Australia to Ontario International Airport, Ontario, United States is 16 hours 17 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 • STF - ONT

Kilometers		11409 km
Statute Miles		7089 miles
Nautical Miles		6157 nm
Avg. Time of Flight		16 hours 17 minutes

Stephens Island Seaplane Base to Ontario International Airport Flight Route Map - STF to ONT Flight Path

Location of Stephens Island Seaplane Base & Ontario International Airport is given below.
Click the map to view Stephens Island to Ontario nonstop flight path and travel direction.

Click to see flight route on Google Map between Stephens Island, Australia and Ontario, United States. .

Nonstop flight route between Stephens Island, Australia and Ontario, United States.

Time Difference Between the Airports • STF - ONT

Time difference between Stephens Island (Australia) and Ontario (United States) is 17 Hours.
Ontario time is 17 Hours behind Stephens Island.

Location	Local Time
Stephens Island (Australia)	2026-09-12, 21:03:54 AEST
Ontario (United States)	2026-09-12, 04:03:54 PDT

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

Stephens Island Seaplane Base (STF / YSTI) Stephens Island, Australia

Destination

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