ONT Ontario International Airport

The IATA airport code for Ontario International Airport is ONT.

The ICAO code for Ontario International Airport is KONT.

Ontario International Airport (ONT) is located in Ontario, United States.

The local time zone at Ontario International Airport (ONT) is America/Los_Angeles (GMT-7).

About 81 scheduled departures were counted at Ontario International Airport (ONT) when flight schedules were last measured on September 4, 2026.

For international flights, arrive at least 3 hours before departure; for domestic flights, about 2 hours.

Based on the current departures board at Ontario International Airport (ONT), scheduled flights are operated by Southwest Airlines, American Airlines, United Airlines, Alaska Airlines, and Frontier Airlines.

Destinations on the current departures board at Ontario International Airport (ONT) include Denver, Dallas-Fort Worth, Las Vegas, Phoenix, San Francisco, and Sacramento.

The board on this page shows arrivals and departures for Ontario International Airport (ONT). It re-checks for updates while the page is open, and every board states how old its data is — busy hubs are refreshed within hours, quieter airports less often.