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

Austin, TX (AUS) to St. Louis, MO (STL) flight delay odds

77.1% of 977 official scheduled AUS-to-STL flights arrived on time; 12.8% arrived at least 30 minutes late and 0.1% 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
77.1%arrived on time
12.8%30+ min late
0.1%cancelled
977scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.8%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+6.3 mincompleted flights

Which departure time was most reliable for AUS to STL?

Among qualifying AUS-to-STL departure window results, Early morning had the highest on-time rate: 95.1% of 344 flights. Evening was lowest at 43.4% across 113 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning34495.1%1.7%0.3%
Late morning5875.9%12.1%0.0%
Afternoon46272.1%15.6%0.0%
Evening11343.4%35.4%0.0%

Which weekday was most reliable for AUS to STL?

Among qualifying AUS-to-STL weekday results, Tuesday had the highest on-time rate: 84.4% of 141 flights. Sunday was lowest at 69.8% across 162 flights.

DayFlightsOn time30+ minCancelled
Monday14973.2%13.4%0.0%
Tuesday14184.4%9.9%0.0%
Wednesday13883.3%8.0%0.0%
Thursday14976.5%8.1%0.0%
Friday15075.3%13.3%0.0%
Saturday8879.5%12.5%0.0%
Sunday16269.8%22.8%0.6%

Which airline was most reliable for AUS to STL?

Only Southwest Airlines met the AUS-to-STL airline threshold: 77.1% of 977 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines97777.1%12.8%0.1%

Which month was most reliable for AUS to STL?

Among qualifying AUS-to-STL month results, January 2026 had the highest on-time rate: 87.3% of 63 flights. June 2026 was lowest at 59.3% across 86 flights.

MonthFlightsOn time30+ minCancelled
July 20259369.9%18.3%0.0%
August 20257677.6%14.5%0.0%
September 20257379.5%8.2%0.0%
October 20258383.1%10.8%0.0%
November 20258580.0%15.3%0.0%
December 20259181.3%8.8%0.0%
January 20266387.3%9.5%1.6%
February 20265983.1%5.1%0.0%
March 20268670.9%14.0%0.0%
April 20268985.4%9.0%0.0%
May 20269373.1%14.0%0.0%
June 20268659.3%22.1%0.0%

What drove AUS to STL delay minutes?

Late aircraft was the largest recorded AUS-to-STL delay category, accounting for 60.1% of 11,432 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.0%
Late aircraft60.1%
National airspace8.7%
Weather1.1%
Security0.1%
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.