Historical on-time performance
St. Louis to Las Vegas
1,372 miData through Dec 2025Source: US DOT · BTS
Flights on STL–LAS arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 1,760 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9035 minCancel0.9%Flights1,760
Why flights run late
Delay causes
- Airline27%
- Weather4%
- Air traffic (NAS)20%
- Late aircraft50%
- 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 STL → LAS
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 · 2,002 flights
- Middays78% on time · p90 35 min · 908 flights
- Afternoons71% on time · p90 45 min · 1,079 flights
- Evenings67% on time · p90 60 min · 1,063 flights
- Overnights65% on time · p90 55 min · 1,104 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 81% on time.
- Tuesdays81% on time · p90 30 min · 826 flights
- Wednesdays79% on time · p90 30 min · 816 flights
- Saturdays77% on time · p90 40 min · 673 flights
- Mondays77% on time · p90 40 min · 967 flights
- Thursdays75% on time · p90 40 min · 928 flights
- Fridays74% on time · p90 40 min · 964 flights
- Sundays73% on time · p90 45 min · 982 flights
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