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
Filed traffic dataIn May 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 42% of departures; flights ran 86% full.
Departures
879
May 2026
Seats
153,158
both directions
Passengers
131,340
both directions
Load factor
85.8%
RPM ÷ ASM
Who flies BOS–SFO?
United Airlines operated the most nonstop BOS–SFO departures in May 2026 (371), one of 3 carriers on the route.
- UA
371 departures · 66,367 seats
Share of departures42.2%85.2%
Load
- B6
334 departures · 53,043 seats
Share of departures38.0%86.7%
Load
- DL
174 departures · 33,748 seats
Share of departures19.8%85.2%
Load
What plane flies BOS–SFO?
In May 2026, the Boeing 737 MAX 9 flew 42% of BOS–SFO departures — more than any other aircraft type.
- Boeing 737 MAX 9
366 departures · 85.3% load
41.6% - Airbus A321neo
315 departures · 85.9% load
35.8% - Airbus A321
193 departures · 86.7% load
22.0% - Boeing 737 MAX 8
3 departures · 96.6% load
0.3% - Boeing 757-200
1 departures · 65.9% load
0.1% - Boeing 737-900ER
1 departures · 57.0% load
0.1%
How has BOS–SFO traffic changed?
Nonstop BOS–SFO departures rose from 877 in June 2025 to 879 in May 2026.
Monthly nonstop BOS–SFO traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
May 2026
879 departures · 131,340 passengers
85.8%
Load
By direction
Each direction is filed separately — they rarely match.
SFO → BOS
86.5% full
440 departures · 66,338 passengers
BOS → SFO
85.0% full
439 departures · 65,002 passengers
Nonstop BOS–SFO traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
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 May 2026, the Boeing 737 MAX 9 flew the largest share of departures (41.6%), followed by the Airbus A321neo (35.8%).
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.
Trip reports on YouTube
Fliers post trip reports from this route to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.
Jeb Brooks
Delta Airlines BRAND NEW A321neo First Class from Boston to SFO
11:25 · May 2022
QFS Aviation
TRIP REPORT | United Airlines - 757 200 - Boston (BOS) to San Francisco (SFO) | First Class
38:57 · Aug 2018
Genki's Travels
Delta Airlines | A321neo | First Class | San Francisco (SFO) to Boston (BOS) | Trip Report
22:36 · Jun 2022
Source: YouTube. Titles, thumbnails, and channel names come from YouTube. Playing a video loads the YouTube player, and using it means you agree to the YouTube Terms of Service; the Google Privacy Policy applies.
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