San Diego (SAN) to Santa Rosa (STS)
Flight time
≈ 1h 49m
Bearing
323° NW
San Diego (SAN) to Santa Rosa (STS) is 509 miles (819 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SAN–STS
US DOT T-100 · filed dataIn April 2026, SkyWest Airlines operated the most departures, one of 3 carriers flying nonstop SAN–STS; the Embraer E175 was the most common aircraft at 70% of departures; flights ran 70% full.
Departures
242
April 2026
Seats
22,845
both directions
Passengers
16,022
both directions
Load factor
70.1%
passengers ÷ seats
Who flies SAN–STS?
SkyWest Airlines operated the most nonstop SAN–STS departures in April 2026 (151), one of 3 carriers on the route.
- OO
SkyWest Airlines
151 departures · 11,476 seats
Share of departures62.4%76.8%
Load
- WN
Southwest Airlines
73 departures · 10,001 seats
Share of departures30.2%59.7%
Load
- QX
Horizon Air
18 departures · 1,368 seats
Share of departures7.4%90.1%
Load
What plane flies SAN–STS?
In April 2026, the Embraer E175 flew 70% of SAN–STS departures — more than any other aircraft type.
- Embraer E175
169 departures · 78.2% load
69.8% - Boeing 737-700
73 departures · 59.7% load
30.2%
How has SAN–STS traffic changed?
Nonstop SAN–STS departures rose from 125 in May 2025 to 242 in April 2026.
Monthly nonstop SAN–STS traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
125 departures · 7,192 passengers
75.7%
Load
June 2025
119 departures · 7,244 passengers
81.3%
Load
July 2025
122 departures · 7,983 passengers
86.1%
Load
August 2025
144 departures · 8,868 passengers
82.1%
Load
September 2025
158 departures · 9,095 passengers
75.7%
Load
October 2025
163 departures · 9,836 passengers
79.4%
Load
November 2025
157 departures · 8,998 passengers
75.4%
Load
December 2025
100 departures · 6,643 passengers
87.4%
Load
January 2026
99 departures · 6,022 passengers
80.0%
Load
February 2026
87 departures · 5,992 passengers
90.6%
Load
March 2026
138 departures · 8,849 passengers
84.4%
Load
April 2026
242 departures · 16,022 passengers
70.1%
Load
By direction
The DOT files each direction separately — they rarely match.
SAN → STS
68.2% full
121 departures · 7,809 passengers
STS → SAN
72.1% full
121 departures · 8,213 passengers
Nonstop SAN–STS 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 Santa Rosa (STS)?
SAN to STS is 509 miles (819 km / 442 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SAN to STS?
A nonstop covers the 509-mile great-circle distance in roughly 1h 49m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SAN–STS?
In April 2026, the Embraer E175 flew the largest share of departures (69.8%), followed by the Boeing 737-700 (30.2%).
What mileage do I earn flying SAN–STS?
Distance-based programs credit off the 509-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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