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

St. Louis, MO (STL) to Los Angeles, CA (LAX) flight delay odds

73.8% of 1,028 official scheduled STL-to-LAX flights arrived on time; 14.4% arrived at least 30 minutes late and 0.2% 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
73.8%arrived on time
14.4%30+ min late
0.2%cancelled
1,028scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.5%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+12.8 mincompleted flights

Which departure time was most reliable for STL to LAX?

Among qualifying STL-to-LAX departure window results, Late morning had the highest on-time rate: 83.5% of 109 flights. Night was lowest at 41.0% across 105 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning59180.2%10.3%0.3%
Late morning10983.5%6.4%0.0%
Afternoon6567.7%15.4%0.0%
Evening15867.7%20.9%0.0%
Night10541.0%35.2%0.0%

Which weekday was most reliable for STL to LAX?

Among qualifying STL-to-LAX weekday results, Wednesday had the highest on-time rate: 83.1% of 130 flights. Monday was lowest at 60.4% across 159 flights.

DayFlightsOn time30+ minCancelled
Monday15960.4%25.2%0.0%
Tuesday13782.5%11.7%0.0%
Wednesday13083.1%6.2%0.0%
Thursday15473.4%14.3%0.6%
Friday16173.3%13.0%0.0%
Saturday13377.4%12.0%0.0%
Sunday15470.1%16.2%0.6%

Which airline was most reliable for STL to LAX?

Among qualifying STL-to-LAX airline results, SkyWest Airlines had the highest on-time rate: 74.9% of 354 flights. Southwest Airlines was lowest at 73.3% across 674 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines67473.3%15.3%0.0%
SkyWest Airlines35474.9%12.7%0.6%

Which month was most reliable for STL to LAX?

Among qualifying STL-to-LAX month results, September 2025 had the highest on-time rate: 86.6% of 82 flights. April 2026 was lowest at 53.4% across 73 flights.

MonthFlightsOn time30+ minCancelled
July 20259377.4%18.3%0.0%
August 20259283.7%10.9%0.0%
September 20258286.6%4.9%0.0%
October 20259661.5%18.8%0.0%
November 202510181.2%13.9%0.0%
December 202510370.9%14.6%0.0%
January 20267573.3%13.3%0.0%
February 20267474.3%10.8%0.0%
March 20267676.3%9.2%1.3%
April 20267353.4%20.5%1.4%
May 20267576.0%14.7%0.0%
June 20268869.3%21.6%0.0%

What drove STL to LAX delay minutes?

Airline was the largest recorded STL-to-LAX delay category, accounting for 56.4% of 16,831 BTS-attributed delay minutes during July 2025–June 2026.

Airline56.4%
Late aircraft26.7%
National airspace9.6%
Weather7.2%
Security0.0%
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.