Boston (BOS) → San Francisco (SFO)
Boston Logan International Airport to San Francisco International Airport · 2,344 nm (4,341 km) · about 5.5 h nonstop
Cheapest economy fares, checked daily · 1 day of history
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Economy
last checked 31m agoAlaska Airlines · 1 stop · 10h 40m · travel Nov 10
| Checked | Fare | Airline | Stops | Travel | Sold via | |
|---|---|---|---|---|---|---|
| 2026-09-09 | $144 | Alaska Airlines | 1 stop | Nov 10 | — | Book ↗ |
Airlines selling the cheapest fares
Which carrier had the lowest fare on each of our checks over the last 90 days.
- Alaska Airlines ×1
About this route
Boston (BOS) to San Francisco (SFO) is one of the busiest air routes in its market (US domestic). It links Boston Logan International Airport in United States with San Francisco International Airport in United States. The great-circle distance is about 2,344 nautical miles (2,698 statute miles), so expect roughly 5.5 hours in the air nonstop.
Every night we ask our fare provider for the cheapest one-way economy fare other travellers recently found on this route and record it, with the airline and the seller it was found with. A fare is flagged as a deal when it falls at least 30% below the route's 90-day typical price. Prices are a research starting point, not live availability — the booking links open the itinerary so you can confirm what's on sale right now.
Fares are approximate, from public sources, and can be stale — always verify before booking.