Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

DELTA · FLIGHT DL 1683 LANDED 9:37 PM ET, ~10 MIN LATE · SCHEDULED TIME UNKNOWN

DL 1683 · DCA → DTW

took off 8:35 PM ET · landed 9:37 PM ET (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 1h after departure

Odds over time

Arrive at DTW more than 15 minutes late?
68% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
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