Skip to content
WanderNerd
Check a flight

Route Reliability

St. Louis → Milwaukee

STL–MKE · 317 miles · St. Louis Lambert International Airport to Milwaukee Mitchell International Airport

89
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
4 min
Average arrival delay
0.7%
Cancelled
683
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 84% of the time across 683 flights. No comparison to make.

What the data says

Morning-you made the right choice.

STL–MKE flights departing between 6–9 AM arrived on time 96% of the time, versus 70% between 9 PM–12 AM.

Mondays have been rough.

STL–MKE flights arrived on time 92% of the time on Saturdays and just 76% on Mondays. That gap is worth planning around.

Flights on this route

The breakdown

On-time by weekday
  • Mon76%(102 flights)
  • Tue87%(104 flights)
  • Wed88%(104 flights)
  • Thu83%(103 flights)
  • Fri82%(102 flights)
  • Sat92%(75 flights)
  • Sun83%(88 flights)
On-time by departure window
  • 6–9 AM96%(82 flights)
  • 9 AM–12 PM92%(249 flights)
  • 12–3 PM86%(28 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM78%(142 flights)
  • 9 PM–12 AM70%(172 flights)
On-time trend by month
92%
May

Jun 89% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%55
July 202579%57
August 202588%59
September 202587%60
October 202586%57
November 202577%53
December 202583%58
January 202674%57
February 202692%52
March 202677%51
April 202683%58
May 202692%61

Keep nerding

Based on 683 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.