Distance From Ontario International Airport to Belfast International Airport, ONT - BFS Distance

The distance from Ontario International Airport (ONT) to Belfast International Airport (BFS) is 5087 miles or 8186 kilometers or 4417 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 Ontario ( United States ) to Belfast ( United Kingdom )?

A one-way nonstop (direct) flight between Ontario and Belfast takes around 11 hours 41 minutes.

Estimated flight time from Ontario International Airport, Ontario, United States to Belfast International Airport, Belfast, United Kingdom is 11 hours 41 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 - BFS

Kilometers		8186 km
Statute Miles		5087 miles
Nautical Miles		4417 nm
Avg. Time of Flight		11 hours 41 minutes

Ontario International Airport to Belfast International Airport Flight Route Map - ONT to BFS Flight Path

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

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

Nonstop flight route between Ontario, United States and Belfast, United Kingdom.

Time Difference Between the Airports • ONT - BFS

Time difference between Ontario (United States) and Belfast (United Kingdom) is 8 Hours.
Belfast time is 8 Hours ahead of Ontario.

Location	Local Time
Ontario (United States)	2026-06-22, 02:44:27 PDT
Belfast (United Kingdom)	2026-06-22, 10:44:27 BST

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

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

Destination

Belfast International Airport (BFS / EGAA) Belfast, United Kingdom