San Diego (SAN) to Seattle (SEA)
Flight time
≈ 2h 54m
Bearing
347° N
San Diego (SAN) to Seattle (SEA) is 1,051 miles (1,692 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SAN–SEA
US DOT T-100 · filed dataIn April 2026, Alaska Airlines operated the most departures, one of 4 carriers flying nonstop SAN–SEA; the Boeing 737-800 was the most common aircraft at 25% of departures; flights ran 84% full.
Departures
818
April 2026
Seats
130,758
both directions
Passengers
110,080
both directions
Load factor
84.2%
passengers ÷ seats
Who flies SAN–SEA?
Alaska Airlines operated the most nonstop SAN–SEA departures in April 2026 (465), one of 4 carriers on the route.
- AS
Alaska Airlines
465 departures · 80,803 seats
Share of departures56.8%83.4%
Load
- DL
Delta Air Lines
292 departures · 39,835 seats
Share of departures35.7%84.8%
Load
- WN
Southwest Airlines
60 departures · 10,044 seats
Share of departures7.3%88.0%
Load
- QX
Horizon Air
1 departures · 76 seats
Share of departures0.1%98.7%
Load
What plane flies SAN–SEA?
In April 2026, the Boeing 737-800 flew 25% of SAN–SEA departures — more than any other aircraft type.
- Boeing 737-800
203 departures · 83.3% load
24.8% - Boeing 737-900ER
188 departures · 83.1% load
23.0% - Boeing 737 MAX 9
168 departures · 82.4% load
20.5% - Airbus A220-300
120 departures · 87.5% load
14.7% - Airbus A220-100
56 departures · 90.5% load
6.9% - Boeing 737 MAX 8
52 departures · 86.7% load
6.4% - Airbus A319
18 departures · 83.3% load
2.2% - Boeing 737-700
12 departures · 90.4% load
1.5% - Embraer E175
1 departures · 98.7% load
0.1%
How has SAN–SEA traffic changed?
Nonstop SAN–SEA departures fell from 829 in May 2025 to 818 in April 2026.
Monthly nonstop SAN–SEA traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
829 departures · 103,230 passengers
76.5%
Load
June 2025
845 departures · 115,783 passengers
83.3%
Load
July 2025
873 departures · 125,830 passengers
87.9%
Load
August 2025
838 departures · 124,270 passengers
88.6%
Load
September 2025
764 departures · 97,001 passengers
73.9%
Load
October 2025
677 departures · 88,396 passengers
79.8%
Load
November 2025
633 departures · 81,025 passengers
81.3%
Load
December 2025
697 departures · 90,945 passengers
84.1%
Load
January 2026
661 departures · 82,120 passengers
75.9%
Load
February 2026
608 departures · 82,632 passengers
83.0%
Load
March 2026
760 departures · 99,742 passengers
83.1%
Load
April 2026
818 departures · 110,080 passengers
84.2%
Load
By direction
The DOT files each direction separately — they rarely match.
SEA → SAN
83.9% full
410 departures · 55,076 passengers
SAN → SEA
84.5% full
408 departures · 55,004 passengers
Nonstop SAN–SEA 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 San Diego (SAN) from Seattle (SEA)?
SAN to SEA is 1,051 miles (1,692 km / 914 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SAN to SEA?
A nonstop covers the 1,051-mile great-circle distance in roughly 2h 54m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SAN–SEA?
In April 2026, the Boeing 737-800 flew the largest share of departures (24.8%), followed by the Boeing 737-900ER (23.0%).
What mileage do I earn flying SAN–SEA?
Distance-based programs credit off the 1,051-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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