Las Vegas (LAS) to St. Louis (STL): On-Time Performance
Data through July 2026
Las Vegas (LAS) to St. Louis (STL) effectively runs on two schedules. In November 2024, 88% of arrivals were on time; in July 2026 that fell to 67% — a 22-point seasonal swing. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 67%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 5.8
- last 12 months
- Duration
- 3h 12m
- scheduled
- Distance
- 1,371 mi
Best airline from LAS to STL
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 80% | 14 min | 2.4% | 575 |
| Southwest Airlines | 79% | 12 min | 0.3% | 3,689 |
Monthly on-time trend
Best time to fly from LAS to STL
Aim for departures around 5 a.m. (95% on-time); avoid 8 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 15 min |
| Tuesdaybest | 87% | 7 min |
| Wednesday | 86% | 9 min |
| Thursday | 74% | 16 min |
| Friday | 76% | 16 min |
| Saturday | 86% | 7 min |
| Sunday | 73% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft50%
- Airline operations40%
- National airspace system9%
- Weather1%
Frequently asked questions
- How often are flights from LAS to STL delayed?
- 21% of LAS–STL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from LAS to STL?
- Frontier Airlines has the best on-time record on this route at 80%, based on 575 flights. 2 airlines flew LAS–STL frequently enough to compare in this period.
- What is the best time of day to fly from LAS to STL?
- Departures around 5 a.m. have the best record (95% on-time), while departures around 8 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to STL?
- The scheduled LAS–STL flight time averages 3h 12m over 1,371 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are LAS to STL flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from LAS to STL?
- July 2026 was the roughest month in this dataset, with only 67% of arrivals on time. The best was November 2024 at 88%. If your dates are flexible, that 22-point gap is worth planning around.
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Based on 4,298 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.