MDW → STLChicago to St Louis

live

Direct flights from Chicago (MDW) to St Louis (STL): 7 nonstop departures observed each week across 1 airline. 70% of the last 10 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 10 tracked flights. The nonstop covers 404 km, an estimated 1 hour 1 minutes in the air. Measured by Pro Flight Search from live flight boards at Chicago and St Louis. Updated 13 September 2026 at 15:38 UTC.

MDW Chicago smooth · +0
STL St Louis smooth · +0
404 km · ~1h 01m est.
dep bank 07:55–20:557x weekly
Runs mixed · 1 airline · 7x weekly · nonstop
70% on time

of the last 10 operated MDW → STL flights arrived within 15 minutes

Median arrival delay is +1 min. 0 of 10 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+1 minacross the last 10 operated legs
Flight time~1h 01mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 10

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 AirlinesWN70% on time

Flights WN2837 varies daily · WN2838 09:20 Mo Th Fr Su · WN370 varies Sa · WN3877 10:10 Tu We

History

operated legs · board outcomes
09-13WN2837dep −4 → arr−32
09-12WN126dep −7 → arr−26
09-12WN2837dep −4 → arr−22
09-12WN370dep −1 → arr+22
09-12WN8503departed+32
09-11WN2837departed−4
09-11WN2838departed+12
09-11WN2839departed+1
09-11WN290departed−1
09-11WN4254departed+38

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
MDWChicago +0 min smooth 🌤 mostly cloudy · NW 8 kt Full MDW delay board →
STLSt Louis +0 min smooth 🌤 mostly cloudy · S 3 kt Full STL delay board →

Weather lens

Current conditions put the pressure at MDW and STL: 43% 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 Chicago to St Louis route actually runs

Pro Flight Search records official board updates for nonstop MDW to STL 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 — Chicago (MDW) to St Louis (STL) route reliability, measured from operated flights on official airport boards.

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

MDW to STL questions

Is MDW–STL running on time right now?

Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on MDW–STL?

Operators schedule morning departures around 09:20 and evening departures around 17:50 from MDW. Earlier flights typically land before destination-airport delays accumulate later in the day; check the STL delay card to confirm conditions when you'd arrive.

How long is the flight from MDW to STL?

Great-circle distance is 404 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 59–65 min gate-to-gate on this route.

How often does MDW–STL fly?

Southwest Airlines runs the route with about 35 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.