WN 1644 then WN 657 at Denver
Salt Lake City → Denver → Detroit
Timetable, Denver time
07:20WN 1644 from Salt Lake City at the gate
17:25WN 657 to Detroit leaves the gate
10 h 05 apart on the timetable
The last days
WN 1644 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.