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

Pittsburgh, PA (PIT) to St. Louis, MO (STL) flight delay odds

81.9% of 476 official scheduled PIT-to-STL flights arrived on time; 10.5% 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 SIGNALLower disruption
81.9%arrived on time
10.5%30+ min late
0.2%cancelled
476scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.3%all scheduled flights
120+ minutes late1.1%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+0.7 mincompleted flights

Which departure time was most reliable for PIT to STL?

Among qualifying PIT-to-STL departure window results, Early morning had the highest on-time rate: 96.4% of 165 flights. Evening was lowest at 58.3% across 144 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning16596.4%1.2%0.0%
Afternoon14987.9%5.4%0.0%
Evening14458.3%27.8%0.7%

Which weekday was most reliable for PIT to STL?

Among qualifying PIT-to-STL weekday results, Tuesday had the highest on-time rate: 94.3% of 70 flights. Sunday was lowest at 76.5% across 85 flights.

DayFlightsOn time30+ minCancelled
Monday6976.8%11.6%0.0%
Tuesday7094.3%5.7%0.0%
Wednesday6882.4%8.8%0.0%
Thursday6877.9%10.3%0.0%
Friday6978.3%15.9%0.0%
Saturday4791.5%4.3%0.0%
Sunday8576.5%14.1%1.2%

Which airline was most reliable for PIT to STL?

Only Southwest Airlines met the PIT-to-STL airline threshold: 81.9% of 476 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines47681.9%10.5%0.2%

Which month was most reliable for PIT to STL?

Among qualifying PIT-to-STL month results, November 2025 had the highest on-time rate: 93.5% of 31 flights. March 2026 was lowest at 75.9% across 54 flights.

MonthFlightsOn time30+ minCancelled
July 20253585.7%5.7%0.0%
August 20253580.0%5.7%0.0%
September 20253491.2%2.9%0.0%
October 20253582.9%14.3%0.0%
November 20253193.5%3.2%0.0%
December 20253177.4%12.9%0.0%
January 20262781.5%11.1%3.7%
February 20262788.9%7.4%0.0%
March 20265475.9%20.4%0.0%
April 20265683.9%10.7%0.0%
May 20265676.8%10.7%0.0%
June 20265576.4%12.7%0.0%

What drove PIT to STL delay minutes?

Late aircraft was the largest recorded PIT-to-STL delay category, accounting for 76.2% of 4,363 BTS-attributed delay minutes during July 2025–June 2026.

Airline11.4%
Late aircraft76.2%
National airspace11.0%
Weather1.3%
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.