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Route Reliability

Milwaukee → St. Louis

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

93
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
4 min early
Average arrival delay
0.9%
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 90% of the time across 683 flights. No comparison to make.

What the data says

Morning-you made the right choice.

MKE–STL flights departing between 6–9 AM arrived on time 98% of the time, versus 81% between 3–6 PM.

Skip Thursday if you can.

MKE–STL flights arrived on time 96% of the time on Saturdays. On Thursdays: 83%.

Slipping a little lately.

MKE–STL flights arrived on time 87% of the time over the last three months in the data, compared with 91% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon91%(101 flights)
  • Tue92%(103 flights)
  • Wed90%(104 flights)
  • Thu83%(102 flights)
  • Fri89%(102 flights)
  • Sat96%(76 flights)
  • Sun89%(87 flights)
On-time by departure window
  • 3–6 AM94%(135 flights)
  • 6–9 AM98%(213 flights)
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM81%(261 flights)
  • 6–9 PM89%(55 flights)
On-time trend by month
87%
May

Jun 87% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%55
July 202586%57
August 202590%59
September 202595%60
October 202597%57
November 202593%53
December 202585%58
January 202689%55
February 202698%52
March 202678%51
April 202695%57
May 202687%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.