AA 1957 then UA 1994 at DFW
Phoenix → Dallas-Fort Worth → Denver
Timetable, Dallas-Fort Worth time
12:02AA 1957 from Phoenix at the gate
16:55UA 1994 to Denver leaves the gate
4 h 53 apart on the timetable
The last days
AA 1957 and UA 1994 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.