Seattle (SEA) to San Francisco (SFO)
Flight time
≈ 2h 09m
Bearing
180° S
Seattle (SEA) to San Francisco (SFO) is 679 miles (1,093 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SEA–SFO
Filed traffic dataIn July 2026, Alaska Airlines operated the most departures, one of 5 carriers flying nonstop SEA–SFO; the Airbus A320 was the most common aircraft at 22% of departures; flights ran 85% full.
Departures
1,327
July 2026
Seats
196,708
both directions
Passengers
167,298
both directions
Load factor
85.0%
RPM ÷ ASM
Who flies SEA–SFO?
Alaska Airlines operated the most nonstop SEA–SFO departures in July 2026 (542), one of 5 carriers on the route.
- AS
542 departures · 94,496 seats
Share of departures40.8%84.6%
Load
- UA
416 departures · 64,266 seats
Share of departures31.3%86.3%
Load
- DL
184 departures · 24,252 seats
Share of departures13.9%81.8%
Load
- OO
180 departures · 13,314 seats
Share of departures13.6%87.9%
Load
- QX
5 departures · 380 seats
Share of departures0.4%84.7%
Load
What plane flies SEA–SFO?
In July 2026, the Airbus A320 flew 22% of SEA–SFO departures — more than any other aircraft type.
- Airbus A320
290 departures · 86.0% load
21.9% - Boeing 737-900ER
278 departures · 85.2% load
20.9% - Boeing 737 MAX 9
198 departures · 84.5% load
14.9% - Embraer E175
185 departures · 87.8% load
13.9% - Airbus A220-300
171 departures · 83.7% load
12.9% - Boeing 737-800
106 departures · 82.5% load
8.0% - Boeing 737 MAX 8
72 departures · 89.9% load
5.4% - Airbus A319
20 departures · 79.4% load
1.5% - Airbus A321neo
4 departures · 48.2% load
0.3% - Airbus A220-100
2 departures · 97.3% load
0.1% - Boeing 757-200
1 departures · 0.0% load
0.1%
How has SEA–SFO traffic changed?
Nonstop SEA–SFO departures rose from 1,235 in August 2025 to 1,327 in July 2026.
Monthly nonstop SEA–SFO traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
1,235 departures · 162,090 passengers
88.8%
Load
September 2025
1,165 departures · 142,153 passengers
81.4%
Load
October 2025
1,158 departures · 135,888 passengers
79.0%
Load
November 2025
1,118 departures · 129,672 passengers
78.5%
Load
December 2025
1,115 departures · 130,770 passengers
80.1%
Load
January 2026
960 departures · 111,157 passengers
78.7%
Load
February 2026
963 departures · 112,907 passengers
81.7%
Load
March 2026
1,029 departures · 122,433 passengers
84.5%
Load
April 2026
993 departures · 121,651 passengers
84.6%
Load
May 2026
1,177 departures · 138,326 passengers
82.1%
Load
June 2026
1,261 departures · 155,162 passengers
83.8%
Load
July 2026
1,327 departures · 167,298 passengers
85.0%
Load
By direction
Each direction is filed separately — they rarely match.
SFO → SEA
84.5% full
665 departures · 82,930 passengers
SEA → SFO
85.6% full
662 departures · 84,368 passengers
Nonstop SEA–SFO traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Seattle (SEA) from San Francisco (SFO)?
SEA to SFO is 679 miles (1,093 km / 590 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SEA to SFO?
A nonstop covers the 679-mile great-circle distance in roughly 2h 09m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SEA–SFO?
In July 2026, the Airbus A320 flew the largest share of departures (21.9%), followed by the Boeing 737-900ER (20.9%).
What mileage do I earn flying SEA–SFO?
Distance-based programs credit off the 679-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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