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

San Antonio, TX (SAT) to St. Louis, MO (STL) flight delay odds

85.6% of 547 official scheduled SAT-to-STL flights arrived on time; 8.8% arrived at least 30 minutes late and 0.0% 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 SIGNALLower disruption
85.6%arrived on time
8.8%30+ min late
0.0%cancelled
547scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.7%all scheduled flights
120+ minutes late1.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+0.1 mincompleted flights

Which departure time was most reliable for SAT to STL?

Among qualifying SAT-to-STL departure window results, Early morning had the highest on-time rate: 94.1% of 222 flights. Evening was lowest at 69.6% across 46 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning22294.1%3.2%0.0%
Late morning4092.5%2.5%0.0%
Afternoon23979.5%13.0%0.0%
Evening4669.6%19.6%0.0%

Which weekday was most reliable for SAT to STL?

Among qualifying SAT-to-STL weekday results, Tuesday had the highest on-time rate: 92.7% of 82 flights. Sunday was lowest at 76.0% across 75 flights.

DayFlightsOn time30+ minCancelled
Monday8982.0%16.9%0.0%
Tuesday8292.7%4.9%0.0%
Wednesday7892.3%2.6%0.0%
Thursday8785.1%6.9%0.0%
Friday8984.3%6.7%0.0%
Saturday4787.2%6.4%0.0%
Sunday7576.0%16.0%0.0%

Which airline was most reliable for SAT to STL?

Only Southwest Airlines met the SAT-to-STL airline threshold: 85.6% of 547 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines54785.6%8.8%0.0%

Which month was most reliable for SAT to STL?

Among qualifying SAT-to-STL month results, September 2025 had the highest on-time rate: 93.6% of 47 flights. June 2026 was lowest at 67.3% across 52 flights.

MonthFlightsOn time30+ minCancelled
July 20255388.7%7.5%0.0%
August 20254791.5%0.0%0.0%
September 20254793.6%0.0%0.0%
October 20255390.6%5.7%0.0%
November 20253378.8%15.2%0.0%
December 20254085.0%10.0%0.0%
January 20262989.7%6.9%0.0%
February 20262788.9%3.7%0.0%
March 20265477.8%16.7%0.0%
April 20265689.3%8.9%0.0%
May 20265687.5%7.1%0.0%
June 20265267.3%21.2%0.0%

What drove SAT to STL delay minutes?

Late aircraft was the largest recorded SAT-to-STL delay category, accounting for 57.2% of 4,078 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.9%
Late aircraft57.2%
National airspace9.3%
Weather2.6%
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.