Flights from Boston to San Francisco from $ 297*
More United deals on Boston (BOS) to San Francisco (SFO) flights
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 06/16/26 - 06/20/26 | from $ 307 Viewed: 35 minutes ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 05/30/26 - 05/31/26 | from $ 312 Viewed: 6 hours ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 05/30/26 - 06/05/26 | from $ 312 Viewed: 2 hours ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 06/06/26 - 06/10/26 | from $ 297 Viewed: 1 day ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 07/14/26 - 07/21/26 | from $ 307 Viewed: 18 hours ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 05/30/26 - 06/02/26 | from $ 307 Viewed: 18 hours ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 07/18/26 - 07/21/26 | from $ 307 Viewed: 18 hours ago |
| Boston (BOS) | San Francisco (SFO) | Roundtrip | Economy | 06/13/26 - 06/20/26 | from $ 307 Viewed: 10 hours ago |
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
