DL 1903 then DL 8918 at Atlanta
Tampa → Atlanta → Chicago Midway
Timetable, Atlanta time
06:45DL 1903 from Tampa at the gate
14:00DL 8918 to Chicago Midway leaves the gate
7 h 15 apart on the timetable
The last days
DL 1903 and DL 8918 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.