WN 971 then WN 1582 at Detroit
Baltimore → Detroit → St Louis
Timetable, Detroit time
11:00WN 971 from Baltimore at the gate
14:55WN 1582 to St Louis leaves the gate
3 h 55 apart on the timetable
The last days
WN 971 and WN 1582 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.