Historical on-time performance
Baltimore to San Antonio
1,407 miData through Dec 2025Source: US DOT · BTS
Flights on BWI–SAT arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 803 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time76%Medianon timep9045 minCancel1.1%Flights803
Why flights run late
Delay causes
- Airline35%
- Weather6%
- Air traffic (NAS)18%
- Late aircraft39%
- Security2%
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 BWI → 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 63% to 85% on time.
- Mornings85% on time · p90 20 min · 785 flights
- Middays81% on time · p90 25 min · 408 flights
- Evenings66% on time · p90 55 min · 624 flights
- Afternoons64% on time · p90 75 min · 242 flights
- Overnights63% on time · p90 65 min · 489 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 80% on time.
- Wednesdays80% on time · p90 30 min · 352 flights
- Tuesdays76% on time · p90 35 min · 353 flights
- Sundays76% on time · p90 55 min · 350 flights
- Thursdays73% on time · p90 40 min · 398 flights
- Mondays72% on time · p90 50 min · 413 flights
- Fridays69% on time · p90 55 min · 411 flights
- Saturdays68% on time · p90 45 min · 271 flights
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