WN 2124 then WN 4329 at Phoenix
San Diego → Phoenix → Denver
Timetable, Phoenix time
09:15WN 2124 from San Diego at the gate
19:05WN 4329 to Denver leaves the gate
9 h 50 apart on the timetable
The last days
WN 2124 and WN 4329 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.