Historical on-time performance
Seattle to Santa Rosa
618 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–STS arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 318 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time64%Median5 minp9055 minCancel0.0%Flights92
- Alaska AirlinesbestOn-time80%Medianon timep9040 minCancel0.4%Flights226
Why flights run late
Delay causes
- Airline39%
- Weather1%
- Air traffic (NAS)20%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → STS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 73% to 78% on time.
- Mornings78% on time · p90 25 min · 105 flights · limited
- Middays78% on time · p90 30 min · 863 flights
- Evenings77% on time · p90 40 min · 293 flights
- Afternoons73% on time · p90 35 min · 168 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 83% on time.
- Tuesdays83% on time · p90 25 min · 194 flights · limited
- Saturdays81% on time · p90 25 min · 186 flights · limited
- Mondays76% on time · p90 30 min · 216 flights
- Thursdays76% on time · p90 45 min · 211 flights
- Wednesdays75% on time · p90 35 min · 194 flights · limited
- Sundays75% on time · p90 40 min · 217 flights
- Fridays75% on time · p90 40 min · 212 flights
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