DL 1697 then UA 2297 at Boston
Phoenix → Boston → Denver
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
15:05UA 2297 to Denver leaves the gate
18 h 05 apart on the timetable, overnight
UA 2297 leaves 18 h 05 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.