WN 598 then WN 554 at Denver
Milwaukee → Denver → Phoenix Sky Harbor
Timetable, Denver time
13:10WN 598 from Milwaukee at the gate
19:40WN 554 to Phoenix Sky Harbor leaves the gate
6 h 30 apart on the timetable
The last days
WN 598 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.