Seattle (SEA) to Santa Rosa (STS)
Flight time
≈ 2h 02m
Bearing
183° S
Seattle (SEA) to Santa Rosa (STS) is 618 miles (995 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SEA–STS
Filed traffic dataIn May 2026, Alaska Airlines operated the most departures, one of 3 carriers flying nonstop SEA–STS; the Embraer E175 was the most common aircraft at 49% of departures; flights ran 74% full.
Departures
121
May 2026
Seats
14,450
both directions
Passengers
10,730
both directions
Load factor
74.3%
RPM ÷ ASM
Who flies SEA–STS?
Alaska Airlines operated the most nonstop SEA–STS departures in May 2026 (62), one of 3 carriers on the route.
- AS
62 departures · 9,966 seats
Share of departures51.2%77.1%
Load
- QX
56 departures · 4,256 seats
Share of departures46.3%71.5%
Load
- OO
3 departures · 228 seats
Share of departures2.5%0.0%
Load
What plane flies SEA–STS?
In May 2026, the Embraer E175 flew 49% of SEA–STS departures — more than any other aircraft type.
- Embraer E175
59 departures · 67.8% load
48.8% - Boeing 737-800
52 departures · 77.4% load
43.0% - Boeing 737 MAX 8
10 departures · 75.8% load
8.3%
How has SEA–STS traffic changed?
Nonstop SEA–STS departures rose from 118 in June 2025 to 121 in May 2026.
Monthly nonstop SEA–STS traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
118 departures · 10,598 passengers
78.0%
Load
July 2025
121 departures · 11,554 passengers
82.0%
Load
August 2025
122 departures · 12,902 passengers
79.5%
Load
September 2025
119 departures · 13,669 passengers
72.2%
Load
October 2025
124 departures · 11,565 passengers
77.1%
Load
November 2025
117 departures · 9,784 passengers
70.4%
Load
December 2025
101 departures · 9,221 passengers
74.0%
Load
January 2026
91 departures · 5,985 passengers
62.8%
Load
February 2026
101 departures · 6,048 passengers
70.3%
Load
March 2026
120 departures · 8,471 passengers
73.8%
Load
April 2026
114 departures · 9,932 passengers
72.3%
Load
May 2026
121 departures · 10,730 passengers
74.3%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → STS
74.1% full
61 departures · 5,384 passengers
STS → SEA
74.4% full
60 departures · 5,346 passengers
Nonstop SEA–STS 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 Seattle (SEA) from Santa Rosa (STS)?
SEA to STS is 618 miles (995 km / 537 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SEA to STS?
A nonstop covers the 618-mile great-circle distance in roughly 2h 02m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SEA–STS?
In May 2026, the Embraer E175 flew the largest share of departures (48.8%), followed by the Boeing 737-800 (43.0%).
What mileage do I earn flying SEA–STS?
Distance-based programs credit off the 618-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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