Historical on-time performance
Las Vegas to San Antonio
1,069 miData through Dec 2025Source: US DOT · BTS
Flights on LAS–SAT arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 1,980 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Spirit AirlinesbestOn-time86%Medianon timep9035 minCancel0.7%Flights451
- Southwest AirlinesOn-time75%Medianon timep9045 minCancel0.7%Flights1,529
Why flights run late
Delay causes
- Airline32%
- Weather2%
- Air traffic (NAS)16%
- Late aircraft51%
- 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 LAS → SAT
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 — 90% on time.
- Mornings90% on time · p90 10 min · 2,289 flights
- Early mornings79% on time · p90 35 min · 155 flights · limited
- Middays78% on time · p90 30 min · 1,314 flights
- Evenings66% on time · p90 65 min · 1,088 flights
- Afternoons64% on time · p90 65 min · 1,258 flights
- Overnights62% on time · p90 60 min · 565 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 83% on time.
- Wednesdays83% on time · p90 25 min · 868 flights
- Saturdays81% on time · p90 30 min · 827 flights
- Tuesdays81% on time · p90 30 min · 847 flights
- Mondays75% on time · p90 40 min · 1,044 flights
- Sundays74% on time · p90 40 min · 1,063 flights
- Thursdays73% on time · p90 45 min · 979 flights
- Fridays71% on time · p90 55 min · 1,041 flights
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