Boston (BOS) to San Francisco (SFO)
Flight time
≈ 6h 12m
Bearing
281° W
Boston (BOS) to San Francisco (SFO) is 2,697 miles (4,341 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BOS–SFO
US DOT T-100 · filed dataIn April 2026, United Airlines operated the most departures, one of 3 carriers flying nonstop BOS–SFO; the Boeing 737 MAX 9 was the most common aircraft at 44% of departures; flights ran 84% full.
Departures
758
April 2026
Seats
132,319
both directions
Passengers
111,624
both directions
Load factor
84.4%
passengers ÷ seats
Who flies BOS–SFO?
United Airlines operated the most nonstop BOS–SFO departures in April 2026 (334), one of 3 carriers on the route.
- UA
United Airlines
334 departures · 59,786 seats
Share of departures44.1%83.2%
Load
- B6
JetBlue Airways
279 departures · 44,416 seats
Share of departures36.8%86.3%
Load
- DL
Delta Air Lines
145 departures · 28,117 seats
Share of departures19.1%83.7%
Load
What plane flies BOS–SFO?
In April 2026, the Boeing 737 MAX 9 flew 44% of BOS–SFO departures — more than any other aircraft type.
- Boeing 737 MAX 9
331 departures · 83.2% load
43.7% - Airbus A321neo
244 departures · 84.7% load
32.2% - Airbus A321
180 departures · 86.2% load
23.8% - Boeing 737-900ER
3 departures · 89.4% load
0.4%
How has BOS–SFO traffic changed?
Nonstop BOS–SFO departures fell from 864 in May 2025 to 758 in April 2026.
Monthly nonstop BOS–SFO traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
864 departures · 130,098 passengers
86.9%
Load
June 2025
877 departures · 137,567 passengers
90.0%
Load
July 2025
898 departures · 142,448 passengers
91.4%
Load
August 2025
861 departures · 136,482 passengers
91.3%
Load
September 2025
816 departures · 119,584 passengers
84.1%
Load
October 2025
846 departures · 128,590 passengers
87.3%
Load
November 2025
700 departures · 100,794 passengers
82.0%
Load
December 2025
703 departures · 102,472 passengers
83.4%
Load
January 2026
594 departures · 83,270 passengers
81.5%
Load
February 2026
524 departures · 76,170 passengers
83.4%
Load
March 2026
645 departures · 97,610 passengers
85.1%
Load
April 2026
758 departures · 111,624 passengers
84.4%
Load
By direction
The DOT files each direction separately — they rarely match.
BOS → SFO
83.3% full
379 departures · 55,074 passengers
SFO → BOS
85.5% full
379 departures · 56,550 passengers
Nonstop BOS–SFO traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Frequently asked
How far is Boston (BOS) from San Francisco (SFO)?
BOS to SFO is 2,697 miles (4,341 km / 2,344 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BOS to SFO?
A nonstop covers the 2,697-mile great-circle distance in roughly 6h 12m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BOS–SFO?
In April 2026, the Boeing 737 MAX 9 flew the largest share of departures (43.7%), followed by the Airbus A321neo (32.2%).
What mileage do I earn flying BOS–SFO?
Distance-based programs credit off the 2,697-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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