DL4990 BirminghamBHM · 17:00 DetroitDTW
DL4990 by Delta Air Lines flies from Birmingham (BHM) to Detroit (DTW) for the Tue, Sep 22 departure.
en route from BHM to DTW
board checked 5m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 18:48.
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation0 cancelled · 9 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at BHM and DTW are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. 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 Birmingham to Detroit flights today
same route · Delta Air LinesIf DL4990 is cancelled, these are the other Delta Air Lines nonstop flights from Birmingham to Detroit on the same day, with scheduled departure times in BHM local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL4990 actually runs
Pro Flight Search has tracked every published board update for DL4990 across the BHM and DTW boards: schedule changes, gate pushes and actual clocks. Usually departs ~10 min late. Based on 9 confirmed departures · 6/9 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL4990 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: N297PQ, N600LR, N182GJ, N302PQ.
Board clocks recorded as BHM and DTW published them.
Planning around DL4990? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL4990 Birmingham to Detroit on-time performance, measured from the BHM and DTW airport boards.
https://proflightsearch.com/flight/DL4990
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