Historical on-time performance
Seattle to San Antonio
1,774 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–SAT arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 545 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesOn-time75%Medianon timep9035 minCancel1.1%Flights545
Why flights run late
Delay causes
- Airline40%
- Weather0%
- Air traffic (NAS)13%
- Late aircraft46%
- Security1%
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 → SAT
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 72% to 85% on time.
- Mornings85% on time · p90 20 min · 61 flights · limited
- Evenings83% on time · p90 20 min · 89 flights · limited
- Overnights79% on time · p90 25 min · 578 flights
- Middays72% on time · p90 35 min · 1,018 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 84% on time.
- Tuesdays84% on time · p90 25 min · 219 flights
- Wednesdays80% on time · p90 25 min · 227 flights
- Thursdays77% on time · p90 35 min · 278 flights
- Mondays76% on time · p90 30 min · 254 flights
- Fridays73% on time · p90 40 min · 279 flights
- Sundays71% on time · p90 25 min · 279 flights
- Saturdays70% on time · p90 40 min · 210 flights
Advertisement
Keep exploring