| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option San Francisco Ontario | Outbound 09/04/25 direct F92678 01h 29min | Return 09/28/25 direct F92677 01h 32min |  Frontier Airlines |  | $111 | ||
| San Francisco Ontario | Outbound 09/04/25 direct F92678 01h 29min | Return 09/28/25 direct F92677 01h 32min | Frontier Airlines |  | $117 | ||
| San Francisco Ontario | Outbound 09/04/25 direct F92678 01h 29min | Return 09/28/25 direct F92677 01h 32min | Frontier Airlines |  | ? | $121 | |
| San Francisco Ontario | Outbound 10/18/25 1 Stopover (LAS) F94158, F91357 04h 37min | Return 11/17/25 direct F92677 01h 32min | Frontier Airlines | | ? | $124 | |
| San Francisco Ontario | Outbound 09/04/25 direct F92678 01h 29min | Return 09/28/25 direct F92677 01h 32min | Frontier Airlines |  | $127 | ||
| San Francisco Ontario | Outbound 09/04/25 direct F92678 01h 29min | Return 09/28/25 direct F92677 01h 32min | Frontier Airlines |  | $132 | ||
| San Francisco Ontario | Outbound 10/18/25 1 Stopover (LAS) F94158, F92231 12h 42min | Return 11/17/25 direct F92677 01h 32min | Frontier Airlines | | $136 | ||
| San Francisco Ontario | Outbound 10/18/25 1 Stopover (LAS) F94158, F91357 04h 37min | Return 11/17/25 direct F92677 01h 32min | Frontier Airlines | | $139 | ||
| San Francisco Ontario | Outbound 10/18/25 1 Stopover (LAS) F94158, F92231 12h 42min | Return 11/17/25 direct F92677 01h 32min | Frontier Airlines | | $140 | ||
| San Francisco Ontario | Outbound 10/18/25 direct UA1697 01h 28min | Return 11/17/25 direct UA0277 01h 41min |  United Airlines |  | ? | $191 |
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 %