UA 3872 then FX 1317 at O'Hare
Pensacola → Chicago → Memphis
Timetable, Chicago time
14:43UA 3872 from Pensacola at the gate
20:20FX 1317 to Memphis leaves the gate
5 h 37 apart on the timetable
The last days
UA 3872 and FX 1317 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.