WN 3091 then UA 3757 at Phoenix
St Louis → Phoenix → Denver
Timetable, Phoenix time
16:30WN 3091 from St Louis at the gate
17:27UA 3757 to Denver leaves the gate
57 min apart on the timetable
The last days
WN 3091 and UA 3757 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.