STL → MKESt Louis to Milwaukee

live

Direct flights from St Louis (STL) to Milwaukee (MKE): 7 nonstop departures observed each week across 1 airline. 85% of the last 13 operated flights arrived within 15 minutes of schedule. The median arrival is 7 minutes early. No cancellations were recorded across the 13 tracked flights. The nonstop covers 511 km, an estimated 1 hour 9 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Milwaukee. Updated 13 September 2026 at 03:33 UTC.

STL St Louis busy · +16
MKE Milwaukee smooth · +0
511 km · ~1h 09m est.
dep bank 08:25–19:457x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
85% on time

of the last 13 operated STL → MKE flights arrived within 15 minutes

Median arrival delay is −7 min. 0 of 13 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−7 minacross the last 13 operated legs
Flight time~1h 09mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 13

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Southwest AirlinesWN85% on time

Flights WN4500 varies daily · WN4133 14:30 Sa · WN178 18:45 Tu We · WN1321 19:05 Mo Th Fr

History

operated legs · board outcomes
09-12WN4133dep +13 → arr−11
09-12WN4500dep +4 → arr−16
09-11WN1321dep +52 → arr+28
09-11WN4500dep +4 → arr−16
09-10WN1321dep +17 → arr−7
09-10WN4500dep +38 → arr+14
09-09WN178dep +7 → arr−16
09-09WN4500dep +2 → arr−19
09-08WN178dep +21 → arr−10
09-08WN4500dep +12 → arr−6
09-07WN1321dep +23 → arr−3
09-07WN4500dep +21 → arr+3
09-06WN2254dep +50 → arr+27

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
STLSt Louis +16 min busy 🌤 few clouds · NNE 5 kt Full STL delay board →
MKEMilwaukee +0 min smooth 🌤 clear · N 0 kt Full MKE delay board →

Weather lens

Current conditions put the pressure at STL and MKE: 45% odds of a 15+ minute delay and around +11 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the St Louis to Milwaukee route actually runs

Pro Flight Search records official board updates for nonstop STL to MKE flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — St Louis (STL) to Milwaukee (MKE) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/STL-MKE
How we measure this →

STL to MKE questions

Is STL–MKE running on time right now?

Smooth skies ahead. The departure side at STL is the weaker end, route health score 89/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on STL–MKE?

Operators schedule evening departures around 18:45 from STL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the MKE delay card to confirm conditions when you'd arrive.

How long is the flight from STL to MKE?

Great-circle distance is 511 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 66–74 min gate-to-gate on this route.

How often does STL–MKE fly?

Southwest Airlines runs the route with about 14 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.