Distance From Commodore Center Seaplane Base to Ontario International Airport

The distance from Commodore Center Seaplane Base () to Ontario International Airport (ONT) is 381 miles or 614 kilometers or 331 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 Mill Valley ( United States ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Mill Valley and Ontario takes around 0 hours 52 minutes.

Estimated flight time from Commodore Center Seaplane Base, Mill Valley, United States to Ontario International Airport, Ontario, United States is 0 hours 52 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 • - ONT

Kilometers		614 km
Statute Miles		381 miles
Nautical Miles		331 nm
Avg. Time of Flight		0 hours 52 minutes

Commodore Center Seaplane Base to Ontario International Airport Flight Route Map - to ONT Flight Path

Location of Commodore Center Seaplane Base & Ontario International Airport is given below.
Click the map to view Mill Valley to Ontario nonstop flight path and travel direction.

Click to see flight route on Google Map between Mill Valley, United States and Ontario, United States. .

Nonstop flight route between Mill Valley, United States and Ontario, United States.

Time Difference Between the Airports • - ONT

Time difference between Mill Valley (United States) and Ontario (United States) is 0 Hours.

Location	Local Time
Mill Valley (United States)	2026-05-07, 06:24:36 PDT
Ontario (United States)	2026-05-07, 06:24:36 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

Commodore Center Seaplane Base ( / 22CA) Mill Valley, United States

Destination

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