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Southwest · Ontario International Airport · ONT

Southwest nonstop flights from Ontario

13 nonstop destinations on Southwest out of ONT — 38% of everything that departs. Zero layovers, zero connections.

13
Nonstop cities
38%
of ONT departures
224
Flights / week
ONT
Your origin

Where Southwest can take you

Dashed arcs = Southwest nonstop routes from ONT · updates with the day filter
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All nonstop destinations from Ontario (ONT) every airline, not just Southwest

Everywhere Southwest flies 121 airports

Where can you fly nonstop on Southwest from Ontario (ONT)?

Southwest flies 13 nonstop routes from Ontario International Airport (ONT), around 224 departures a week — 38% of everything leaving ONT.

Its busiest is Ontario to Sacramento at 42 Southwest flights a week. 8 of these 13 destinations have no other nonstop operator from ONT, so Southwest is the only way to reach them without a connection.

Use the day filter above to see which Southwest routes fly on the day you want to travel. Route data updated November 2026 from observed departures.

Frequencies shown are Southwest's own departures, counted from observed schedules. Schedules change — always confirm with the airline before booking.