WN 136 then AA 357 at Phoenix
Denver → Phoenix → Philadelphia
Timetable, Phoenix time
11:50WN 136 from Denver at the gate
15:45AA 357 to Philadelphia leaves the gate
3 h 55 apart on the timetable
The last days
WN 136 and AA 357 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.