G4 472 then G4 1406 at Philadelphia
Des Moines → Philadelphia → Knoxville
Timetable, Philadelphia time
11:22G4 472 from Des Moines at the gate
16:52G4 1406 to Knoxville leaves the gate
5 h 30 apart on the timetable
The last days
G4 472 and G4 1406 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.