Southwest AirlinesWN88% on time
Flights WN3811 varies daily · WN3812 varies Mo Tu We Th Fr Su · WN3813 varies Tu We Sa Su · WN332 16:15 Mo Th Fr
live
Direct flights from St Louis (STL) to Baltimore (BWI): 7 nonstop departures observed each week across 1 airline. 88% of the last 24 operated flights arrived within 15 minutes of schedule. The median arrival is 13 minutes early. No cancellations were recorded across the 24 tracked flights. The nonstop covers 1,184 km, an estimated 2 hours 1 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Baltimore. Updated 9 September 2026 at 04:16 UTC.
STL
St Louis
busy · +19
BWI
Baltimore
smooth · +0
1,184 km · ~2h 01m est.
Runs reliable · 1 airline · 7x weekly · nonstop
88% on time
of the last 24 operated STL → BWI flights arrived within 15 minutes
Median arrival delay is −13 min. 0 of 24 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−13 minacross the last 24 operated legs
Flight time~2h 01mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 24
The week
scheduled departures · origin local time06121824
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 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at STL: 42% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the St Louis to Baltimore route actually runs
Pro Flight Search records official board updates for nonstop STL to BWI 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 Baltimore (BWI) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/STL-BWI
STL to BWI questions
Is STL–BWI running on time right now?
Smooth skies ahead. The departure side at STL is the weaker end, route health score 87/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on STL–BWI?
Operators schedule evening departures around 18:50 from STL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BWI delay card to confirm conditions when you'd arrive.
How long is the flight from STL to BWI?
Great-circle distance is 1,184 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 114–131 min gate-to-gate on this route.
How often does STL–BWI fly?
Southwest Airlines runs the route with about 27 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
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