WN 1315 then WN 2124 at Phoenix
St Louis → Phoenix → Denver
Timetable, Phoenix time
06:30WN 1315 from St Louis at the gate
10:00WN 2124 to Denver leaves the gate
3 h 30 apart on the timetable
The last days
WN 1315 and WN 2124 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.