St Louis (STL) to Las Vegas (LAS) flights
Southwest Airlines, Frontier Airlines fly nonstop from St. Louis Lambert International Airport to Harry Reid International Airport, with about 43 flights a week in July 2026. The 1,371-mile flight takes about 3h 26m gate to gate.
- Distance
- 1,371 mi · 2,206 km
- Flight time
- 3h 26m
- Airlines
- 2
- Seats filled
- 76%
Airlines flying STL to LAS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 36 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 235,474 | 3h 25m |
| Frontier Airlines | 7 | Airbus A320neo, Airbus A321, Airbus A320-100/200 | 42,625 | 3h 34m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to LAS flight schedule
7 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 5:55am and the last at 8:50pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 3845Southwest Airlines | 5:55am | 7:20am | 28 | 96% |
| WN 1003Southwest Airlines | 8:25am | 9:50am | 16 | 94% |
| WN 4072Southwest Airlines | 9:05am | 10:30am | 12 | 92% |
| WN 3846Southwest Airlines | 1:45pm | 3:10pm | 28 | 75% |
| WN 3847Southwest Airlines | 6:25pm | 7:55pm | 20 | 30% |
| F9 2017Frontier Airlines | 7:10pm | 8:43pm | 25 | 73% |
| WN 4407Southwest Airlines | 8:50pm | 10:15pm | 16 | 50% |
Is STL to LAS on time?
From September 2025 to August 2026, 75% of 2,107 flights arrived within 15 minutes of schedule and 0.6% were cancelled. Flights leaving around 5am were the most punctual (96%), those around 7pm the least (55%). Most delay time was caused by late-arriving aircraft (49%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,789 | 75% | 15 min | 0.2% |
| Frontier Airlines | 318 | 76% | 27 min | 2.8% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 188 | 96% | |
| 6am to 7am | 147 | 93% | |
| 7am to 8am | 136 | 90% | |
| 8am to 9am | 113 | 87% | |
| 9am to 10am | 111 | 82% | |
| 12pm to 1pm | 86 | 86% | |
| 1pm to 2pm | 119 | 71% | |
| 2pm to 3pm | 238 | 69% | |
| 4pm to 5pm | 73 | 64% | |
| 5pm to 6pm | 111 | 80% | |
| 6pm to 7pm | 124 | 57% | |
| 7pm to 8pm | 187 | 55% | |
| 8pm to 9pm | 102 | 72% | |
| 9pm to 10pm | 207 | 61% | |
| 10pm to 11pm | 76 | 57% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 157 | 19,815 | |
| September 2025 | 163 | 22,397 | |
| October 2025 | 188 | 25,342 | |
| November 2025 | 173 | 21,546 | |
| December 2025 | 186 | 25,338 | |
| January 2026 | 160 | 21,166 | |
| February 2026 | 145 | 19,363 | |
| March 2026 | 206 | 28,822 | |
| April 2026 | 166 | 21,345 | |
| May 2026 | 169 | 23,501 | |
| June 2026 | 177 | 23,245 | |
| July 2026 | 190 | 26,219 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.