Alaska Airlines Flights from Boston to San Francisco
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1 Passenger
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Lowest fares from Boston to San Francisco
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One-way low-fare flights Boston to San Francisco.*
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From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Jun 2, 2026 | From $114 Seen: 9 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Apr 29, 2026 | From $114 Seen: 15 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Mar 4, 2026 | From $124 Seen: 7 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Mar 10, 2026 | From $109 Seen: 18 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Mar 11, 2026 | From $109 Seen: 18 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Jun 10, 2026 | From $114 Seen: 18 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: May 5, 2026 | From $114 Seen: 18 hours ago | |
| Boston (BOS) | San Francisco (SFO) | One-way | Saver | Depart: Apr 30, 2026 | From $129 Seen: 18 hours ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.