DL 1697 then UA 2496 at Boston
Phoenix → Boston → Chicago O'Hare
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
15:01UA 2496 to Chicago O'Hare leaves the gate
18 h 01 apart on the timetable, overnight
UA 2496 leaves 18 h 01 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.