Distance From Port St Johns Airport to Ontario International Airport, JOH - ONT Distance

The distance from Port St Johns Airport (JOH) to Ontario International Airport (ONT) is 10529 miles or 16944 kilometers or 9143 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 Port St Johns ( South Africa ) to Ontario ( United States )?

A one-way nonstop (direct) flight between Port St Johns and Ontario takes around 24 hours 12 minutes.

Estimated flight time from Port St Johns Airport, Port St Johns, South Africa to Ontario International Airport, Ontario, United States is 24 hours 12 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 • JOH - ONT

Kilometers		16944 km
Statute Miles		10529 miles
Nautical Miles		9143 nm
Avg. Time of Flight		24 hours 12 minutes

Port St Johns Airport to Ontario International Airport Flight Route Map - JOH to ONT Flight Path

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

Click to see flight route on Google Map between Port St Johns, South Africa and Ontario, United States. .

Nonstop flight route between Port St Johns, South Africa and Ontario, United States.

Time Difference Between the Airports • JOH - ONT

Time difference between Port St Johns (South Africa) and Ontario (United States) is 9 Hours.
Ontario time is 9 Hours behind Port St Johns.

Location	Local Time
Port St Johns (South Africa)	2026-06-25, 17:02:07 SAST
Ontario (United States)	2026-06-25, 08:02:07 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

Port St Johns Airport (JOH / FAPJ) Port St Johns, South Africa

Destination

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