AA 268 then WN 645 at Detroit
Miami → Detroit → Las Vegas
Timetable, Detroit time
09:10AA 268 from Miami at the gate
13:25WN 645 to Las Vegas leaves the gate
4 h 15 apart on the timetable
The last days
AA 268 and WN 645 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.