AA 946 then WN 235 at Denver
Philadelphia → Denver → Dallas
Timetable, Denver time
13:59AA 946 from Philadelphia at the gate
18:00WN 235 to Dallas leaves the gate
4 h 01 apart on the timetable
The last days
AA 946 and WN 235 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.