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Local time zone: America/Los_Angeles
Ontario International Airport (ONT) currently has nonstop service to 36 destinations on 14 airlines in our latest departure data. The busiest route is to Denver (DEN), served by 3 carriers, and the largest operator here is Southwest Airlines with nonstops to 12 destinations. 6 of its routes are international.
Route data as of September 28, 2026, based on a 7-day departures sample.
This schedule snapshot includes nonstop flights from ONT to 36 destinations, including 6 international routes. The snapshot shows about 88 flights per day across those routes. The busiest options start with Denver (DEN), Seattle (SEA), Las Vegas (LAS).
All airports near Los Angeles (6 compared) →
6 international routes in this schedule set
United States 30 · Mexico 3 · China 1
7-8/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 Dallas · US
Seattle · 957 mi
Denver · 818 mi · 7-8/day
Las Vegas · 197 mi · 6-7/day
Phoenix · 324 mi · 6-7/day
Sacramento · 390 mi · 6-7/day
San Francisco · 363 mi · 5/day
Honolulu · 2,600 mi · 2-3/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 current departure data is ONT to DEN (Denver), with 7-8/day across 3 airlines.
Southwest Airlines is the largest operator in our ONT schedule data, serving 12 destinations with 31-32/day.
This schedule snapshot includes 6 international routes and 30 domestic routes from ONT.
14 airlines operate at ONT. Top carriers include Southwest Airlines, Alaska Airlines, Frontier Airlines, West Air (USA), United Airlines.
This schedule snapshot includes direct flights from ONT to 36 destinations including Denver, Seattle, Las Vegas, Phoenix, Dallas.
View live arrivals and departures at ONT on FlightRadar24.
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