Detour Flights

Cheap flights from Ontario CA

We are tracking 460 fares out of Ontario CA (ONT) to 168 destinations.

Cheapest tracked fare $19  ·  about $26 below the typical price for that distance

Cheapest fares we're tracking

ToDepartsStopsPrice
(SFO)2026-12-05Direct$19
San Francisco (SFO)2026-12-08Direct$19
San Francisco (SFO)2026-12-09Direct$20
San Francisco (SFO)2026-11-05Direct$23
San Francisco (SFO)2026-10-19Direct$24
San Francisco (SFO)2026-10-29Direct$24
San Francisco (SFO)2026-11-23Direct$24
San Francisco (SFO)2026-12-14Direct$24
San Francisco (SFO)2026-11-12Direct$24
San Francisco (SFO)2026-11-02Direct$24
San Francisco (SFO)2026-12-21Direct$24
San Francisco (SFO)2026-12-07Direct$24
San Francisco (SFO)2026-10-26Direct$28
San Francisco (SFO)2026-12-24Direct$28
Denver (DEN)2026-11-10Direct$30
(DEN)2026-11-12Direct$30
(DEN)2026-11-06Direct$31
San Francisco (SFO)2026-11-13Direct$31
San Francisco (SFO)2026-10-15Direct$32
San Francisco (SFO)2026-11-09Direct$32

Popular destinations

Flights to San FranciscoFlights to DenverFlights to Las VegasFlights to SeattleFlights to PhoenixFlights to San JoseFlights to PortlandFlights to El PasoFlights to Salt Lake CityFlights to SacramentoFlights to AtlantaFlights to Dallas-Fort WorthFlights to St LouisFlights to Chicago O'HareFlights to Houston HobbyFlights to AustinFlights to NashvilleFlights to Washington DC (All Airports)Flights to Reno-TahoeFlights to Washington Dulles

Compare every airport, not just this one

Pin one end of your trip and let a whole region compete for the other. The cheapest airport is often not the one you were going to use.

Find my cheapest airport

Common questions

Where can I fly cheaply from Ontario CA?
We are currently tracking 460 fares out of Ontario CA across 168 destinations, listed cheapest first above.
Is Ontario CA the cheapest airport for this trip?
Not always. Cached fare feeds cover big hubs densely and secondary airports sparsely, so a cheaper nearby airport is often simply missing from a normal search rather than more expensive. Our reverse search prices a whole region's airports against each other to surface it.