WN 863 then DL 2275 at Boston
St Louis → Boston → Washington National
Timetable, Boston time
09:25WN 863 from St Louis at the gate
14:28DL 2275 to Washington National leaves the gate
5 h 03 apart on the timetable
The last days
WN 863 and DL 2275 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.