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

St. Louis, MO (STL) to Milwaukee, WI (MKE) flight delay odds

81.7% of 684 official scheduled STL-to-MKE flights arrived on time; 11.0% arrived at least 30 minutes late and 0.7% 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
81.7%arrived on time
11.0%30+ min late
0.7%cancelled
684scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.7%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+4.2 mincompleted flights

Which departure time was most reliable for STL to MKE?

Among qualifying STL-to-MKE departure window results, Early morning had the highest on-time rate: 92.1% of 101 flights. Night was lowest at 67.8% across 177 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning10192.1%4.0%2.0%
Late morning23291.4%6.9%0.0%
Evening14576.6%13.8%0.0%
Night17767.8%18.6%1.1%

Which weekday was most reliable for STL to MKE?

Among qualifying STL-to-MKE weekday results, Saturday had the highest on-time rate: 87.0% of 77 flights. Monday was lowest at 69.2% across 104 flights.

DayFlightsOn time30+ minCancelled
Monday10469.2%21.2%1.9%
Tuesday10684.9%6.6%0.0%
Wednesday10485.6%4.8%0.0%
Thursday10382.5%12.6%0.0%
Friday10284.3%10.8%0.0%
Saturday7787.0%5.2%2.6%
Sunday8879.5%14.8%1.1%

Which airline was most reliable for STL to MKE?

Only Southwest Airlines met the STL-to-MKE airline threshold: 81.7% of 684 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines68481.7%11.0%0.7%

Which month was most reliable for STL to MKE?

Among qualifying STL-to-MKE month results, February 2026 had the highest on-time rate: 92.3% of 52 flights. January 2026 was lowest at 71.9% across 57 flights.

MonthFlightsOn time30+ minCancelled
July 20255778.9%14.0%0.0%
August 20256086.7%8.3%1.7%
September 20256086.7%8.3%0.0%
October 20255786.0%10.5%0.0%
November 20255475.9%16.7%1.9%
December 20255879.3%10.3%0.0%
January 20265771.9%19.3%0.0%
February 20265292.3%5.8%0.0%
March 20265472.2%13.0%5.6%
April 20265881.0%6.9%0.0%
May 20266191.8%6.6%0.0%
June 20265676.8%12.5%0.0%

What drove STL to MKE delay minutes?

Late aircraft was the largest recorded STL-to-MKE delay category, accounting for 65.4% of 7,714 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.5%
Late aircraft65.4%
National airspace6.2%
Weather0.9%
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.