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.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies SAT–SEA
Filed traffic dataIn May 2026, Alaska Airlines operated the most departures, one of 3 carriers flying nonstop SAT–SEA; the Boeing 737-900ER was the most common aircraft at 35% of departures; flights ran 80% full.
Departures
104
May 2026
Seats
17,898
both directions
Passengers
14,369
both directions
Load factor
80.3%
RPM ÷ ASM
Who flies SAT–SEA?
Alaska Airlines operated the most nonstop SAT–SEA departures in May 2026 (102), one of 3 carriers on the route.
- AS
102 departures · 17,579 seats
Share of departures98.1%81.0%
Load
- 5Y
1 departures · 189 seats
Share of departures1.0%0.0%
Load
- DL
1 departures · 130 seats
Share of departures1.0%93.1%
Load
What plane flies SAT–SEA?
In May 2026, the Boeing 737-900ER flew 35% of SAT–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
36 departures · 86.5% load
34.6% - Boeing 737 MAX 9
33 departures · 79.0% load
31.7% - Boeing 737 MAX 8
27 departures · 73.8% load
26.0% - Boeing 737-800
6 departures · 89.8% load
5.8% - Airbus A220-300
1 departures · 93.1% load
1.0% - Boeing 747-400
1 departures · 0.0% load
1.0%
How has SAT–SEA traffic changed?
Nonstop SAT–SEA departures fell from 121 in June 2025 to 104 in May 2026.
Monthly nonstop SAT–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
121 departures · 17,540 passengers
82.5%
Load
July 2025
120 departures · 18,175 passengers
85.5%
Load
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
By direction
Each direction is filed separately — they rarely match.
SEA → SAT
76.5% full
53 departures · 6,950 passengers
SAT → SEA
84.2% full
51 departures · 7,419 passengers
Nonstop SAT–SEA 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 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 May 2026, the Boeing 737-900ER flew the largest share of departures (34.6%), followed by the Boeing 737 MAX 9 (31.7%).
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.
Keep exploring
Every route below is its own page.
Popular long-haul routes