San Antonio (SAT) to Seattle (SEA)
Flight time
≈ 4h 21m
Bearing
321° NW
San Antonio (SAT) to Seattle (SEA) is 1,774 miles (2,854 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SAT–SEA
Filed traffic dataIn July 2026, Alaska Airlines was the only carrier flying nonstop SAT–SEA; the Boeing 737-900ER was the most common aircraft at 59% of departures; flights ran 88% full.
Departures
122
July 2026
Seats
21,610
both directions
Passengers
18,934
both directions
Load factor
87.6%
RPM ÷ ASM
Who flies SAT–SEA?
Alaska Airlines was the only carrier to fly nonstop SAT–SEA in July 2026 (122 departures).
- AS
122 departures · 21,610 seats
Share of departures100.0%87.6%
Load
What plane flies SAT–SEA?
In July 2026, the Boeing 737-900ER flew 59% of SAT–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
72 departures · 88.3% load
59.0% - Boeing 737 MAX 9
44 departures · 86.1% load
36.1% - Boeing 737-800
4 departures · 94.3% load
3.3% - Boeing 737 MAX 8
2 departures · 83.3% load
1.6%
How has SAT–SEA traffic changed?
Nonstop SAT–SEA departures rose from 112 in August 2025 to 122 in July 2026.
Monthly nonstop SAT–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
112 departures · 16,228 passengers
81.7%
Load
September 2025
94 departures · 12,692 passengers
76.3%
Load
October 2025
104 departures · 14,108 passengers
76.4%
Load
November 2025
97 departures · 13,227 passengers
77.5%
Load
December 2025
105 departures · 14,745 passengers
80.0%
Load
January 2026
74 departures · 10,596 passengers
80.4%
Load
February 2026
56 departures · 9,054 passengers
91.1%
Load
March 2026
62 departures · 10,067 passengers
91.8%
Load
April 2026
63 departures · 9,468 passengers
84.5%
Load
May 2026
104 departures · 14,369 passengers
80.3%
Load
June 2026
123 departures · 18,165 passengers
85.4%
Load
July 2026
122 departures · 18,934 passengers
87.6%
Load
By direction
Each direction is filed separately — they rarely match.
SAT → SEA
90.0% full
61 departures · 9,730 passengers
SEA → SAT
85.2% full
61 departures · 9,204 passengers
Nonstop SAT–SEA 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 San Antonio (SAT) from Seattle (SEA)?
SAT to SEA is 1,774 miles (2,854 km / 1,541 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SAT to SEA?
A nonstop covers the 1,774-mile great-circle distance in roughly 4h 21m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SAT–SEA?
In July 2026, the Boeing 737-900ER flew the largest share of departures (59.0%), followed by the Boeing 737 MAX 9 (36.1%).
What mileage do I earn flying SAT–SEA?
Distance-based programs credit off the 1,774-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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