Distance From Austin Straubel International Airport to Ontario International Airport, GRB - ONT Distance

The distance from Austin Straubel International Airport (GRB) to Ontario International Airport (ONT) is 1721 miles or 2770 kilometers or 1495 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 Green Bay ( United States ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Green Bay and Ontario takes around 3 hours 57 minutes.

Estimated flight time from Austin Straubel International Airport, Green Bay, United States to Ontario International Airport, Ontario, United States is 3 hours 57 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 • GRB - ONT

Kilometers		2770 km
Statute Miles		1721 miles
Nautical Miles		1495 nm
Avg. Time of Flight		3 hours 57 minutes

Austin Straubel International Airport to Ontario International Airport Flight Route Map - GRB to ONT Flight Path

Location of Austin Straubel International Airport & Ontario International Airport is given below.
Click the map to view Green Bay to Ontario nonstop flight path and travel direction.

Click to see flight route on Google Map between Green Bay, United States and Ontario, United States. .

Nonstop flight route between Green Bay, United States and Ontario, United States.

Time Difference Between the Airports • GRB - ONT

Time difference between Green Bay (United States) and Ontario (United States) is 2 Hours.
Ontario time is 2 Hours behind Green Bay.

Location	Local Time
Green Bay (United States)	2025-12-16, 11:45:30 CST
Ontario (United States)	2025-12-16, 09:45:30 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

Austin Straubel International Airport (GRB / KGRB) Green Bay, United States

Destination

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