WN4999 BaltimoreBWI · 19:40 DetroitDTW · 22:20
WN4999 by Southwest Airlines flies from Baltimore (BWI) to Detroit (DTW) for the Thu, Sep 17 departure.
arrival expected at DTW · on schedule
board checked 59m ago · checking again in 45s
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by BWI (Baltimore), currently flying VFR (visual). For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Baltimore to Detroit flights today
same route · Southwest AirlinesIf WN4999 is cancelled, these are the other Southwest Airlines nonstop flights from Baltimore to Detroit on the same day, with scheduled departure times in BWI local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4999 actually runs
Pro Flight Search has tracked every published board update for WN4999 across the BWI and DTW boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 4/4 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how WN4999 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N9021F, N8950L, N8314L, N9013M.
Board clocks recorded as BWI and DTW published them.
Planning around WN4999? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN4999 Baltimore to Detroit on-time performance, measured from the BWI and DTW airport boards.
https://proflightsearch.com/flight/WN4999
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