AA 797 then WN 1957 at Boston
Chicago O'Hare → Boston → Baltimore
Timetable, Boston time
18:49AA 797 from Chicago O'Hare at the gate
17:35WN 1957 to Baltimore leaves the gate
22 h 46 apart on the timetable, overnight
WN 1957 leaves 22 h 46 after AA 797 arrives on the timetable: more than half a day, so not a connection we count.