Ontario International (ONT) is an airport in Ontario, USA serving 31 nonstop destinations across 4 countries. The largest operators are Southwest Airlines, Frontier Airlines and Alaska Airlines. On-time performance is 78.9% based on the most recent BTS data (arrivals not delayed 15+ minutes). Updated 30 August 2026.

Frequently asked questions

How many nonstop destinations does ONT have?

ONT (Ontario International) serves 31 nonstop destinations across 4 countries.

Which airlines fly nonstop from ONT?

Airlines flying nonstop from ONT include Delta Air Lines, Southwest Airlines, Alaska Airlines, American Airlines, United Airlines, Frontier Airlines, Volaris, JetBlue Airways, AVIANCA, China Airlines and 1 more.

What is the on-time performance at ONT?

ONT has an on-time performance rate of 78.9%, based on the most recent BTS data covering arrivals not delayed 15 minutes or more.

What is the ICAO code for ONT?

The ICAO code for ONT (Ontario International) is KONT.

ICAO: KONT
Route data: updated 14 days ago