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Local time zone: America/Los_Angeles · currently 2:59 PM local
Ontario International Airport (ONT) had nonstop service to 41 destinations on 15 airlines in our June 14, 2026 departure snapshot. The busiest route was to Denver (DEN), served by 3 carriers, and the largest operator here was Southwest Airlines with nonstops to 15 destinations. 5 of those routes were international.
Route data as of June 14, 2026, based on a 7-day departures sample. Routes may have changed since this snapshot.
You can fly nonstop from ONT to 41 destinations, including 5 international routes. Current schedules show about 92 flights per day across those routes. The busiest options start with Denver (DEN), Seattle (SEA), Dallas (DFW).
All airports near Los Angeles (6 compared) →
5 international routes in this schedule set
United States 36 · Mexico 3 · El Salvador 1
8-9/day on 3 airlines
Boeing 737 · Airbus A320 family · Embraer E-Jet
These routes have enough tracked flights or schedule depth for a full guide with duration, distance, airlines, aircraft, and frequency.
Ontario to Denver · US
Seattle · 957 mi · 8-9/day
Dallas · 1,186 mi · 7-8/day
Phoenix · 324 mi · 7-8/day
Las Vegas · 197 mi · 6-7/day
Sacramento · 390 mi · 6-7/day
Oakland · 362 mi · 4-5/day
San Francisco · 363 mi · 4/day
Ranked by destinations served, then daily frequency.
+2 more ONT routes on West Air (USA) — use the full route directory for every destination.
Grouped by departure terminal in our schedule data, with each carrier's share of that terminal's captured departures.
Ranked by airlines operating the route. Routes with enough tracked data or schedule depth link to full route guides.
Ontario International Airport (ONT / KONT) is located in Ontario, United States.
The IATA code is ONT. The ICAO code is KONT.
The busiest scheduled route from ONT in our June 14, 2026 departure data was ONT to DEN (Denver), with 8-9/day across 3 airlines.
Southwest Airlines was the largest operator in our ONT schedule data, serving 15 destinations with 35-36/day.
ONT has 5 international routes and 36 domestic routes in the current schedule set.
15 airlines operated at ONT in our June 14, 2026 snapshot. Top carriers include Southwest Airlines, Alaska Airlines, Frontier Airlines, West Air (USA), American Airlines.
ONT has direct flights to 41 destinations including Denver, Seattle, Dallas, Phoenix, Las Vegas.
View live arrivals and departures at ONT on FlightRadar24.
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