| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Ontario San Francisco | Outbound 04/12/25 1 Stopover (DEN) F91500, F91093 06h 41min | Return 04/27/25 direct F92678 01h 28min |  Frontier Airlines |  | $154 | ||
| Best option Ontario San Francisco | Outbound 04/12/25 direct UA0277 01h 28min | Return 04/27/25 direct UA5553 01h 30min |  United Airlines |  | ? | $196 | |
| Ontario San Francisco | Outbound 04/12/25 1 Stopover (DEN) F92908, F91093 14h 15min | Return 04/27/25 direct F92678 01h 28min | Frontier Airlines |  | $162 | ||
| Ontario San Francisco | Outbound 04/12/25 1 Stopover (DEN) F92908, F91093 14h 15min | Return 04/27/25 direct F92678 01h 28min | Frontier Airlines |  | $165 | ||
| Ontario San Francisco | Outbound 04/12/25 1 Stopover (DEN) F92908, F91093 14h 15min | Return 04/27/25 direct UA5553 01h 30min | Frontier Airlines |  | ? | $192 | |
| Ontario San Francisco | Outbound 04/12/25 direct UA0277 01h 28min | Return 04/27/25 direct UA5553 01h 30min | United Airlines |  | ? | $202 | |
| Ontario San Francisco | Outbound 04/12/25 direct UA0277 01h 28min | Return 04/27/25 direct UA5553 01h 30min | United Airlines |  | ? | $438 |
Tips and tricks to help you find cheap flights from Ontario to San Francisco
Favorite airline: Frontier Airlines
The favorite airline for flights from Ontario to San Francisco is Frontier Airlines.
Frontier Airlines
90 %
United Airlines
10 %