DL 1697 then UA 375 at Boston
Phoenix → Boston → Chicago O'Hare
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
13:29UA 375 to Chicago O'Hare leaves the gate
16 h 29 apart on the timetable, overnight
UA 375 leaves 16 h 29 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.