Direct flights from Boston to San Francisco BOS → SFO
Delta Air Lines, JetBlue Airways and United Airlines fly nonstop from Boston (BOS) to San Francisco (SFO), several times daily. The flight takes about 6h 4m and covers 2,697 miles (4,341 km). Round-trip fares typically run around $438, with recent bookable fares from $337. Arrivals run on time 75.4% at BOS and 64.6% at SFO — BTS data for the last three months, counting arrivals within 15 minutes of schedule. Fares last checked 28 August 2026.
60-day flexibility overview based on 81 recent fares across the next 60 days
What flexibility is worth here
Flying in October rather than September typically saves $43 on BOS → SFO.
Typical round-trip fare by departure month, across the 2 months we currently track.
How long you stay changes it too
Staying 10–16 nights typically costs $101 less than 6–9 nights.
Most people pick dates first and see the price second. We watch every date combination on this route and tell you when a good one gets cheap. Watch BOS → SFO →
Cheapest combos
JetBlue Airways
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JetBlue Airways
JetBlue Airways
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JetBlue Airways
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Delta Air Lines
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United Airlines
UA
Departure Schedule typical week
Typical weekly schedule · 104 flights per week (~15 per day) · Updated 25d ago
JetBlue Airways
Delta Air Lines
United Airlines
Frequently asked questions
Is there a direct flight from Boston to San Francisco?
Yes, Delta Air Lines, JetBlue Airways and 1 more airline operate nonstop flights from Boston (BOS) to San Francisco (SFO).
Which airlines fly direct from Boston to San Francisco?
Delta Air Lines, JetBlue Airways, United Airlines operate nonstop flights from Boston to San Francisco.
How long is the flight from Boston to San Francisco?
The nonstop flight from Boston to San Francisco takes ~6h 4m (approximately 4341 km).
How often do direct flights operate from Boston to San Francisco?
Nonstop flights from Boston to San Francisco operate multiple daily — 104 flights per week (~15 per day).
What is the on-time performance for flights from Boston to San Francisco?
Arrivals run on time 75.4% at BOS and 64.6% at SFO — BTS data for the last three months, counting arrivals within 15 minutes of schedule.
What days of the week are there direct flights from Boston to San Francisco?
Direct flights from Boston to San Francisco operate every day of the week. JetBlue Airways flies daily, Delta Air Lines flies daily, and United Airlines flies daily.
How much is a round-trip flight from Boston to San Francisco?
Round-trip flights from Boston (BOS) to San Francisco (SFO) start at $317, with a typical fare around $438. Based on 81 recent fare combinations.
What is the cheapest month to fly from Boston to San Francisco?
Across the 2 departure months we currently track, October 2026 is the cheapest month to fly round trip from Boston to San Francisco, with typical fares around $395 — versus about $438 in September 2026, the most expensive.
Does trip length change the round-trip fare from Boston to San Francisco?
Typical round-trip fares from Boston (BOS) to San Francisco (SFO) by trip length: a week away (6–9 nights) about $438 and around two weeks (10–16 nights) about $337. Medians from 81 recent fare combinations.
Explore More
Scout — our search agent — priced 76 fares on this route in the past week, cheapest $337 round trip. It hunts nonstop fares from Boston every night and pings you when one's worth booking.
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