Route Reliability
St. Louis → Las Vegas
STL–LAS · 1,371 miles · St. Louis Lambert International Airport to Harry Reid International Airport
- 80%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.5%
- Cancelled
- 2,053
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Frontier Airlines82%283 flights
- 2.Southwest Airlines79%1,770 flights
What the data says
Morning flights do better here.
STL–LAS flights departing between 3–6 AM arrived on time 97% of the time, versus 62% between 9 PM–12 AM.
Monday is the weak spot.
STL–LAS flights arrived on time 85% of the time on Wednesdays. On Mondays: 74%.
Not much between Frontier Airlines and Southwest Airlines.
On this route they all land within 79% to 82% on time. Pick on schedule and price.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon74%(325 flights)
- Tue84%(266 flights)
- Wed85%(258 flights)
- Thu79%(309 flights)
- Fri81%(327 flights)
- Sat82%(217 flights)
- Sun76%(332 flights)
- 3–6 AM97%(180 flights)
- 6–9 AM92%(414 flights)
- 9 AM–12 PM87%(136 flights)
- 12–3 PM79%(455 flights)
- 3–6 PM77%(234 flights)
- 6–9 PM70%(326 flights)
- 9 PM–12 AM62%(289 flights)
Jun 78% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 78% | 163 |
| July 2025 | 77% | 162 |
| August 2025 | 85% | 157 |
| September 2025 | 82% | 162 |
| October 2025 | 78% | 188 |
| November 2025 | 84% | 173 |
| December 2025 | 76% | 186 |
| January 2026 | 79% | 159 |
| February 2026 | 83% | 143 |
| March 2026 | 85% | 206 |
| April 2026 | 71% | 166 |
| May 2026 | 81% | 169 |
Keep nerding
Based on 2,053 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.