Southwest Airlines LAS to STL on-time performance
Southwest Airlines nonstop flights from Las Vegas to St. Louis · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
0.1%
2 flights
Avg arrival delay
13 min
53 min when late
Rank on route
#2 of 2
route average 79% on time
Key facts
- Southwest Airlines flights on LAS to STL arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 0.1% were cancelled, and 6% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was late-arriving aircraft (54%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft54%
- Airline (crew, maintenance, cleaning, fueling)38%
- Air traffic control & airport congestion8%
- Extreme weather0%
- Security0%
Other airlines on LAS to STL
- Frontier Airlines83% on time · 13 min avg delay
Full LAS to STL comparison →
Southwest Airlines on-time record across all routes →
1,792 Southwest Airlines flights tracked on this route; 2 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.