WN 136 then DL 2449 at Phoenix
Denver → Phoenix → Seattle
Timetable, Phoenix time
11:50WN 136 from Denver at the gate
15:59DL 2449 to Seattle leaves the gate
4 h 09 apart on the timetable
The last days
WN 136 and DL 2449 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.