AA 2950 then WN 958 at Boston
Chicago O'Hare → Boston → St Louis
Timetable, Boston time
09:37AA 2950 from Chicago O'Hare at the gate
13:10WN 958 to St Louis leaves the gate
3 h 33 apart on the timetable
The last days
AA 2950 and WN 958 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.