WN 937 then UA 3804 at Phoenix
Dallas → Phoenix → Denver
Timetable, Phoenix time
11:20WN 937 from Dallas at the gate
22:30UA 3804 to Denver leaves the gate
11 h 10 apart on the timetable
The last days
WN 937 and UA 3804 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.