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

Houston, TX (HOU) to St. Louis, MO (STL) flight delay odds

79.3% of 1,544 official scheduled HOU-to-STL flights arrived on time; 12.0% arrived at least 30 minutes late and 0.3% 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
79.3%arrived on time
12.0%30+ min late
0.3%cancelled
1,544scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.6%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+5.1 mincompleted flights

Which departure time was most reliable for HOU to STL?

Among qualifying HOU-to-STL departure window results, Early morning had the highest on-time rate: 92.3% of 522 flights. Night was lowest at 65.4% across 104 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning52292.3%2.7%0.2%
Late morning12681.7%7.9%0.8%
Afternoon39974.7%16.3%0.0%
Evening39369.5%17.8%0.5%
Night10465.4%26.0%0.0%

Which weekday was most reliable for HOU to STL?

Among qualifying HOU-to-STL weekday results, Tuesday had the highest on-time rate: 82.7% of 214 flights. Sunday was lowest at 72.0% across 246 flights.

DayFlightsOn time30+ minCancelled
Monday24480.3%10.2%0.0%
Tuesday21482.7%9.3%0.5%
Wednesday20781.6%11.1%0.0%
Thursday23678.8%11.0%0.4%
Friday24079.6%12.1%0.4%
Saturday15781.5%12.1%0.0%
Sunday24672.0%17.9%0.4%

Which airline was most reliable for HOU to STL?

Only Southwest Airlines met the HOU-to-STL airline threshold: 79.3% of 1,544 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,54479.3%12.0%0.3%

Which month was most reliable for HOU to STL?

Among qualifying HOU-to-STL month results, January 2026 had the highest on-time rate: 92.5% of 106 flights. March 2026 was lowest at 67.8% across 143 flights.

MonthFlightsOn time30+ minCancelled
July 202514477.8%16.7%0.0%
August 202513076.2%13.8%0.0%
September 202512588.0%6.4%0.0%
October 202512378.9%8.1%0.0%
November 202513288.6%7.6%0.8%
December 202513886.2%7.2%0.0%
January 202610692.5%2.8%0.9%
February 202610681.1%9.4%0.0%
March 202614367.8%20.3%0.0%
April 202613279.5%14.4%0.0%
May 202613270.5%15.9%1.5%
June 202613368.4%18.0%0.0%

What drove HOU to STL delay minutes?

Late aircraft was the largest recorded HOU-to-STL delay category, accounting for 52.1% of 16,411 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.6%
Late aircraft52.1%
National airspace12.6%
Weather3.9%
Security0.7%
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.