Historical on-time performance
Las Vegas to San Antonio
1,069 miData through May 2026Source: US DOT · BTS
Flights on LAS–SAT arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 1,823 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Spirit AirlinesbestOn-time84%Medianon timep9035 minCancel0.5%Flights219
- Southwest AirlinesOn-time73%Medianon timep9045 minCancel0.3%Flights1,574
- Frontier AirlinesOn-time73%Medianon timep9035 minCancel0.0%Flights30
Why flights run late
Delay causes
- Airline33%
- Weather0%
- Air traffic (NAS)14%
- Late aircraft53%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline20%
- Weather40%
- Air traffic (NAS)40%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 5 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 LAS → SAT
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 — 90% on time.
- Mornings90% on time · p90 10 min · 2,251 flights
- Middays80% on time · p90 30 min · 1,309 flights
- Early mornings78% on time · p90 35 min · 161 flights · limited
- Evenings66% on time · p90 65 min · 1,159 flights
- Afternoons66% on time · p90 60 min · 1,235 flights
- Overnights65% on time · p90 60 min · 495 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 84% on time.
- Wednesdays84% on time · p90 20 min · 846 flights
- Tuesdays82% on time · p90 30 min · 830 flights
- Saturdays82% on time · p90 30 min · 826 flights
- Mondays75% on time · p90 45 min · 1,031 flights
- Sundays74% on time · p90 40 min · 1,046 flights
- Thursdays73% on time · p90 45 min · 990 flights
- Fridays72% on time · p90 50 min · 1,041 flights
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