Tracked live by the FAA. The scheduled times shown are from a typical Wednesday because the FAA's flight plan was first seen after takeoff.

FRONTIER · FLIGHT F9 1596 LANDED 9:00 AM ET, ~85 MIN EARLY

F9 1596 · ORD → ATL

took off 6:31 AM CT · landed 9:00 AM ET (scheduled 7:05 AM CT → 10:30 AM ET)
Forecast issued Wed 10:00 PM ET · 14h after departure

F9 1596 isn’t flying ORD → ATL on Wed, Sep 30

This listing came from a typical schedule. According to the FAA, F9 1596 flies these legs that day: