Distance From Chatham Seaplane Base to Ontario International Airport, CYM - ONT Distance

The distance from Chatham Seaplane Base (CYM) to Ontario International Airport (ONT) is 1812 miles or 2916 kilometers or 1574 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 Chatham ( United States ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Chatham and Ontario takes around 4 hours 9 minutes.

Estimated flight time from Chatham Seaplane Base, Chatham, United States to Ontario International Airport, Ontario, United States is 4 hours 9 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 • CYM - ONT

Kilometers		2916 km
Statute Miles		1812 miles
Nautical Miles		1574 nm
Avg. Time of Flight		4 hours 9 minutes

Chatham Seaplane Base to Ontario International Airport Flight Route Map - CYM to ONT Flight Path

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

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

Nonstop flight route between Chatham, United States and Ontario, United States.

Time Difference Between the Airports • CYM - ONT

Time difference between Chatham (United States) and Ontario (United States) is 1 Hours.
Ontario time is 1 Hours ahead of Chatham.

Location	Local Time
Chatham (United States)	2026-03-21, 14:53:48 AKDT
Ontario (United States)	2026-03-21, 15:53:48 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

Chatham Seaplane Base (CYM / 05AA) Chatham, United States

Destination

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