LAS to STL flight delays
Las Vegas, NV (LAS) St. Louis, MO (STL) · 1,371 miles
180 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
71.75%
Arrived on time
Within 15 minutes of schedule
1.67%
Cancelled
Share of scheduled flights
65 min
When late, late by
Average across delayed arrivals
20 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. STL to LAS arrives on time 17 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This route does better than its own airport. Departures from LAS overall run 7.7 points less punctual than this particular one — so whatever congestion LAS has, this route is largely escaping it.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Flights from Las Vegas to St. Louis run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over March 2025 – August 2026, Southwest Airlines arrived on time most often on LAS to STL.
Every airline on LAS to STL
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 150 | 73.33% | 0% | 55 min | C |
| Frontier Airlines | 30 | 62.96% | 10% | 108 min | — |
The return leg
STL to LAS St. Louis back to Las Vegas 54.8% on time FOther routes from Las Vegas
Common questions
Are flights from Las Vegas to St. Louis usually delayed?
71.75% of flights on the LAS to STL route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Las Vegas to St. Louis?
Only Southwest Airlines appears in the published record on this route, with 150 flights and 73.33% arriving on time.
How often are LAS to STL flights cancelled?
1.67% of scheduled flights did not operate — about 17 in every thousand. That is in the normal range.
When LAS to STL flights are late, how late are they?
About 65 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on LAS to STL during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →