Flights St. Louis → Las Vegas
STL → LAS
How long is the flight from St. Louis to Las Vegas?
The flight from St. Louis (STL) to Las Vegas (LAS) takes 3h 6m on average. That is the median time recorded across 2 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from St. Louis to Las Vegas, primarily operated with Boeing 737-800 and Boeing 737-300 aircraft, sees an average delay of 14 minutes per flight, with 71% of flights arriving on time. The destination airport serves over 52 million passengers annually, indicating high traffic and demand for this route.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The St. Louis (STL) → Las Vegas (LAS) route is operated by Southwest Airlines. Across 1255 flights monitored in recent months, 66% arrived on time (within 15 min of schedule), with an average delay of 20 minutes. The cancellation rate is 0.96%. FlightGuard's average computed risk is 27.1/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Las Vegas the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from St. Louis the average ATFM delay is 5.5 minutes.
Heading to Las Vegas: what to expect in this direction
Flying from St. Louis (STL) to Las Vegas (LAS) heads west for about 2,202 km, a flight time of roughly 3h 6m.
Departures from St. Louis on this leg cluster in the midday window: about 39% of STL-LAS flights take off then.
Air-traffic congestion: departing St. Louis the average ATFM delay is 5.5 min (atfm); arriving into Las Vegas it is 5.5 min (atfm).
Across 1,255 tracked STL-LAS flights, 66% left on time with an average delay of 20 min and a 1.0% cancellation rate.
Route facts
Flights on this route
Check the risk of a specific flight.
Flexible on this trip? Compare flights
Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Southwest Airlines (WN) | 75% | 5 min | 0.3% |
Airlines operating STL-LAS
Airports
Frequently asked questions about STL-LAS
The flight from St. Louis (STL) to Las Vegas (LAS) takes 3h 6m on average. That is the median time recorded across 2 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the St. Louis (STL) -> Las Vegas (LAS) route, on-time performance is 66% with an average delay of 20 minutes, based on 1255 tracked flights.
The cancellation rate on St. Louis-Las Vegas is 0.96% across 1255 monitored flights.
The route is operated by 1 airline: Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Las Vegas, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
