LAS to STL flight delays & on-time performance
Nonstop flights from Harry Reid International Airport to St. Louis Lambert International Airport · 1,371 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAS or STL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Las Vegas (LAS) to St. Louis (STL) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.4% were cancelled, and 6% arrived an hour or more late.
- Frontier Airlines was the most punctual airline here (83% on time); Southwest Airlines was the least (78%).
- Departures scheduled around 6am did best (94% on time); around 7pm did worst (55%).
- Wednesday was the most reliable day to fly (84% on time) and Sunday the least (74%).
- The largest source of delay minutes was late-arriving aircraft (53%).
Which airline is most on time from LAS to STL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Frontier Airlines | 83% | 1.9% | 13 min | 6.6% | 309 |
| Southwest Airlines | 78% | 0.1% | 13 min | 5.9% | 1,792 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am98%47 flights
- 6am94%352 flights
- 7am93%46 flights
- 8am88%214 flights
- 9am87%114 flights
- 10am93%59 flights
- 11am82%103 flights
- 12pm71%192 flights
- 1pm67%110 flights
- 2pm64%161 flights
- 3pm75%119 flights
- 4pm76%166 flights
- 5pm73%146 flights
- 6pm69%136 flights
- 7pm55%74 flights
- 8pm56%62 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%0.6% cancelled
- Tuesday84%0.0% cancelled
- Wednesday84%0.0% cancelled
- Thursday76%0.0% cancelled
- Friday76%1.2% cancelled
- Saturday84%0.0% cancelled
- Sunday74%0.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft53%
- Airline (crew, maintenance, cleaning, fueling)39%
- Air traffic control & airport congestion8%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)75%
- Extreme weather25%
- Air traffic control & airport congestion0%
- Security0%
LAS to STL: common questions
- How often are LAS to STL flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Las Vegas to St. Louis cancelled?
- 0.4% of scheduled flights were cancelled (8 of 2,101).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 56 min behind schedule on average, and 6.0% of flights were an hour or more late.
- How long is taxi time at LAS?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STL to LAS — 76% on time
More flights from Las Vegas
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: LAS → STL, nonstop flights by US airlines that report to the DOT. How we calculate this.