BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
STL→LAS

St. Louis, MO (STL) to Las Vegas, NV (LAS) flight delay odds

76.1% of 2,066 official scheduled STL-to-LAS flights arrived on time; 15.1% arrived at least 30 minutes late and 0.6% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
76.1%arrived on time
15.1%30+ min late
0.6%cancelled
2,066scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.2%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+8.9 mincompleted flights

Which departure time was most reliable for STL to LAS?

Among qualifying STL-to-LAS departure window results, Early morning had the highest on-time rate: 92.0% of 587 flights. Night was lowest at 58.2% across 299 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning58792.0%2.4%0.0%
Late morning14482.6%12.5%0.7%
Afternoon58272.5%16.3%1.0%
Evening45469.8%20.5%0.2%
Night29958.2%30.8%1.3%

Which weekday was most reliable for STL to LAS?

Among qualifying STL-to-LAS weekday results, Wednesday had the highest on-time rate: 81.5% of 260 flights. Monday was lowest at 69.3% across 329 flights.

DayFlightsOn time30+ minCancelled
Monday32969.3%20.1%0.9%
Tuesday27481.4%12.0%0.0%
Wednesday26081.5%8.1%0.4%
Thursday31375.7%16.3%0.3%
Friday33176.4%15.4%0.9%
Saturday22580.9%11.6%0.0%
Sunday33471.0%19.2%1.2%

Which airline was most reliable for STL to LAS?

Among qualifying STL-to-LAS airline results, Southwest Airlines had the highest on-time rate: 76.1% of 1,771 flights. Frontier Airlines was lowest at 75.9% across 295 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,77176.1%14.9%0.2%
Frontier Airlines29575.9%16.6%2.7%

Which month was most reliable for STL to LAS?

Among qualifying STL-to-LAS month results, August 2025 had the highest on-time rate: 83.0% of 159 flights. June 2026 was lowest at 53.9% across 180 flights.

MonthFlightsOn time30+ minCancelled
July 202516473.8%16.5%0.6%
August 202515983.0%11.3%1.3%
September 202516578.2%10.3%0.6%
October 202518876.6%13.3%0.0%
November 202517382.7%13.9%0.0%
December 202518675.8%15.1%0.0%
January 202616177.6%10.6%0.6%
February 202614480.6%9.7%0.7%
March 202620882.7%11.5%1.0%
April 202616770.1%19.8%0.6%
May 202617178.9%12.9%0.0%
June 202618053.9%35.0%1.7%

What drove STL to LAS delay minutes?

Late aircraft was the largest recorded STL-to-LAS delay category, accounting for 46.2% of 32,343 BTS-attributed delay minutes during July 2025–June 2026.

Airline35.9%
Late aircraft46.2%
National airspace16.2%
Weather1.6%
Security0.2%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.