WN 3559 then WN 657 at Denver
Montrose → Denver → Detroit
Timetable, Denver time
09:40WN 3559 from Montrose at the gate
17:25WN 657 to Detroit leaves the gate
7 h 45 apart on the timetable
The last days
WN 3559 and WN 657 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.