Historical on-time performance
San Antonio to Seattle
1,774 miData through Dec 2025Source: US DOT · BTS
Flights on SAT–SEA arrive on time 71% of the time over the last 12 months.
On-time rate71%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 544 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time71%Medianon timep9040 minCancel1.1%Flights544
Why flights run late
Delay causes
- Airline33%
- Weather3%
- Air traffic (NAS)20%
- Late aircraft44%
- 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 SAT → SEA
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 82% on time.
- Mornings82% on time · p90 25 min · 768 flights
- Afternoons69% on time · p90 35 min · 61 flights · limited
- Evenings64% on time · p90 45 min · 916 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 65% to 76% on time.
- Wednesdays76% on time · p90 30 min · 212 flights
- Fridays75% on time · p90 45 min · 279 flights
- Mondays74% on time · p90 35 min · 279 flights
- Tuesdays73% on time · p90 30 min · 224 flights
- Thursdays70% on time · p90 35 min · 260 flights
- Saturdays70% on time · p90 45 min · 238 flights
- Sundays65% on time · p90 40 min · 253 flights
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