| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option San Francisco Ontario | Outbound 04/12/25 direct UA0794 01h 26min | Return 04/27/25 direct UA0277 01h 28min |  United Airlines |  | ? | $174 | |
| San Francisco Ontario | Outbound 04/12/25 direct UA0794 01h 26min | Return 04/27/25 direct UA0277 01h 28min | United Airlines |  | ? | $176 | |
| San Francisco Ontario | Outbound 04/12/25 1 Stopover (DEN) F93440, F91261 13h 41min | Return 04/27/25 direct F92677 01h 41min |  Frontier Airlines |  | $179 | ||
| San Francisco Ontario | Outbound 04/12/25 1 Stopover (DEN) F93440, F91261 13h 41min | Return 04/27/25 direct F92677 01h 41min | Frontier Airlines |  | $182 | ||
| San Francisco Ontario | Outbound 04/12/25 direct UA0794 01h 26min | Return 04/27/25 direct UA0277 01h 28min | United Airlines |  | ? | $182 | |
| San Francisco Ontario | Outbound 04/12/25 direct UA0794 01h 26min | Return 04/27/25 direct UA0277 01h 28min | United Airlines |  | $192 | ||
| San Francisco Ontario | Outbound 04/12/25 1 Stopover (DEN) F93440, F91499 28h 18min | Return 04/27/25 direct F92677 01h 41min | Frontier Airlines |  | ? | $206 | |
| San Francisco Ontario | Outbound 04/12/25 1 Stopover (LAS) F92486, F91283 08h 26min | Return 04/27/25 direct F92677 01h 41min | Frontier Airlines |  | ? | $222 |
Tips and tricks to help you find cheap flights from San Francisco to Ontario
Favorite airline: Frontier Airlines
99 % of travelers choose to book flights on this route with Frontier Airlines and United Airlines.
Frontier Airlines
83 %
United Airlines
16 %