DL 5703 then UA 1349 at Boston
Baltimore → Boston → Chicago O'Hare
Timetable, Boston time
10:41DL 5703 from Baltimore at the gate
09:12UA 1349 to Chicago O'Hare leaves the gate
22 h 31 apart on the timetable, overnight
UA 1349 leaves 22 h 31 after DL 5703 arrives on the timetable: more than half a day, so not a connection we count.