UA 447 then WN 554 at Denver
Tulsa → Denver → Phoenix Sky Harbor
Timetable, Denver time
10:06UA 447 from Tulsa at the gate
19:40WN 554 to Phoenix Sky Harbor leaves the gate
9 h 34 apart on the timetable
The last days
UA 447 and WN 554 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.