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

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

78.9% of 1,533 official scheduled STL-to-HOU flights arrived on time; 12.1% 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
78.9%arrived on time
12.1%30+ min late
0.2%cancelled
1,533scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.0%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+2.4 mincompleted flights

Which departure time was most reliable for STL to HOU?

Among qualifying STL-to-HOU departure window results, Early morning had the highest on-time rate: 92.2% of 551 flights. Night was lowest at 63.8% across 174 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning55192.2%3.3%0.0%
Late morning13786.1%7.3%0.0%
Afternoon25375.5%13.8%0.4%
Evening41867.2%18.7%0.0%
Night17463.8%25.3%1.1%

Which weekday was most reliable for STL to HOU?

Among qualifying STL-to-HOU weekday results, Wednesday had the highest on-time rate: 89.1% of 202 flights. Monday was lowest at 71.7% across 244 flights.

DayFlightsOn time30+ minCancelled
Monday24471.7%17.6%0.0%
Tuesday21085.2%5.7%0.5%
Wednesday20289.1%5.4%0.0%
Thursday23677.1%11.9%0.0%
Friday23980.3%11.7%0.4%
Saturday15975.5%12.6%0.0%
Sunday24374.5%17.7%0.4%

Which airline was most reliable for STL to HOU?

Only Southwest Airlines met the STL-to-HOU airline threshold: 78.9% of 1,533 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,53378.9%12.1%0.2%

Which month was most reliable for STL to HOU?

Among qualifying STL-to-HOU month results, February 2026 had the highest on-time rate: 95.3% of 106 flights. June 2026 was lowest at 65.1% across 126 flights.

MonthFlightsOn time30+ minCancelled
July 202514480.6%12.5%0.7%
August 202513078.5%13.1%0.8%
September 202512584.8%4.0%0.8%
October 202512381.3%12.2%0.0%
November 202513375.9%14.3%0.0%
December 202513870.3%17.4%0.0%
January 202610785.0%8.4%0.0%
February 202610695.3%0.9%0.0%
March 202613976.3%16.5%0.0%
April 202613186.3%6.1%0.0%
May 202613171.8%19.1%0.0%
June 202612665.1%16.7%0.0%

What drove STL to HOU delay minutes?

Late aircraft was the largest recorded STL-to-HOU delay category, accounting for 54.5% of 17,071 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.6%
Late aircraft54.5%
National airspace14.0%
Weather3.9%
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.