San Francisco (SFO) → Boston (BOS)
San Francisco International Airport to Boston Logan International Airport · 2,344 nm (4,341 km) · about 5.5 h nonstop
Cheapest economy fares, checked daily · 38 days of history
Booking links are plain searches — none are affiliate links, and the site earns nothing if you book. Prices are the cheapest fares other travellers recently found, not live availability — always confirm the fare before you pay.
Economy
last checked 5h agoAlaska Airlines · 1 stop · 9h 46m · travel Nov 2 · sold via Clickavia
When it's cheapest to travel
Travel dates of the cheapest fare found at each of our 47 daily checks — where the low fares were, not every date.
| Sep 2026 | $161 | 17× |
| Oct 2026 | $147 | 16× |
| Nov 2026 | $181 | 3× |
| Dec 2026 | $120 | 8× |
| Jan 2027 | $176 | 3× |
| Tuecheapest | $147 | 17× |
| Wed | $152 | 21× |
| Sat | $162 | 3× |
| Mon | $172 | 6× |
| Checked | Fare | Airline | Stops | Travel | Sold via | |
|---|---|---|---|---|---|---|
| 2026-10-23 | $181 | Alaska Airlines | 1 stop | Nov 2 | Clickavia | Book ↗ |
| 2026-10-21 | $181 | Alaska Airlines | 1 stop | Nov 2 | Clickavia | Book ↗ |
| 2026-10-21 | $181 | Alaska Airlines | 1 stop | Nov 2 | Clickavia | Book ↗ |
| 2026-10-20 | $176 | JetBlue Airways | nonstop | Jan 12 | City.Travel | Book ↗ |
| 2026-10-19 | $176 | JetBlue Airways | nonstop | Jan 12 | — | Book ↗ |
| 2026-10-19 | $176 | JetBlue Airways | nonstop | Jan 12 | — | Book ↗ |
| 2026-10-18 | $162 | Southwest Airlines | 1 stop | Dec 5 | — | Book ↗ |
| 2026-10-17 | $162 | Southwest Airlines | 1 stop | Dec 5 | — | Book ↗ |
| 2026-10-16 | $152 | Frontier Airlines | 2 stops | Dec 9 | — | Book ↗ |
| 2026-10-15 | $152 | Frontier Airlines | 2 stops | Dec 9 | — | Book ↗ |
| 2026-10-14 | $152 | Frontier Airlines | 2 stops | Dec 9 | — | Book ↗ |
| 2026-10-13 | $152 | Frontier Airlines | 2 stops | Dec 9 | — | Book ↗ |
Airlines selling the cheapest fares
Which carrier had the lowest fare on each of our checks over the last 90 days.
- Alaska Airlines ×15
- Frontier Airlines ×15
- Southwest Airlines ×11
- JetBlue Airways ×6
About this route
San Francisco (SFO) to Boston (BOS) is one of the busiest air routes in its market (US domestic). It links San Francisco International Airport in United States with Boston Logan 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.