Historical on-time performance
San Antonio to Seattle
1,774 miData through May 2026Source: US DOT · BTS
Flights on SAT–SEA arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 530 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time73%Medianon timep9035 minCancel1.5%Flights530
Why flights run late
Delay causes
- Airline30%
- Weather3%
- Air traffic (NAS)19%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline88%
- Weather0%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 8 cancellations with a reported cause (BTS reports causes from June 2003).
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 (2023-06 .. 2026-05).
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 · 724 flights
- Evenings65% on time · p90 40 min · 922 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 64% to 77% on time.
- Wednesdays77% on time · p90 30 min · 213 flights
- Mondays75% on time · p90 30 min · 266 flights
- Fridays75% on time · p90 45 min · 269 flights
- Saturdays72% on time · p90 40 min · 230 flights
- Tuesdays72% on time · p90 30 min · 222 flights
- Thursdays71% on time · p90 30 min · 254 flights
- Sundays64% on time · p90 45 min · 253 flights
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