WN 2 then WN 3373 at Philadelphia
Dallas → Philadelphia → Chicago Midway
Timetable, Philadelphia time
12:30WN 2 from Dallas at the gate
13:50WN 3373 to Chicago Midway leaves the gate
1 h 20 apart on the timetable
The last days
WN 2 and WN 3373 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.