Cheap flights from San Francisco to Boston
2,698 mi · 45m average nonstop
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Quick answer: San Francisco to Boston at a glance
Cheap flights from San Francisco (SFO) to Boston (BOS) cover 2,698 miles (4,341 km) in about 45m nonstop, with 3 airlines flying direct — a long-haul international route. Search Kayak for today's cheapest live fare. Route difficulty 5/10.
Summary computed from real OpenFlights coordinates — not an estimate. Prices update live on Kayak.
Flying from San Francisco to Boston covers 2,698 miles (4,341 km) in approximately 0 hour 45 minutes. 3 airlines offer direct flights on this long-haul international route. This is a long-haul international route requiring advance planning for connections and layovers.
Nonstop distance 2,698 miles. Direct carriers include B6, UA and VX.
We don't track historical prices for this route yet. Search live fares on Kayak for today's best price across 100+ airlines and booking sites.
Airlines on this route
3 airlines fly San Francisco → Boston. All are direct routes.
| Airline | Route type |
|---|---|
| B6 | Direct |
| UA | Direct |
| VX | Direct |
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San Francisco to Boston — quick answers
How far is San Francisco from Boston by plane?
The nonstop flight distance from San Francisco (SFO) to Boston (BOS) is 2,698 miles (4,341 km), calculated as a great-circle line from published OpenFlights airport coordinates. Actual flown distance is slightly longer due to airways and winds.
How long is the flight from San Francisco to Boston?
The average nonstop flight time from SFO to BOS is 45 minutes. Gate-to-gate time is usually 20–35 minutes longer; connecting itineraries add 1–4 hours depending on the layover.
Which airlines fly from San Francisco to Boston?
3 airlines serve this route nonstop: B6, UA, VX. Schedules and amenities differ by carrier — compare live frequencies and fare classes on Kayak before you book.