AA 6297 then DL 1697 at Phoenix
Flagstaff → Phoenix → Boston
Timetable, Phoenix time
20:08AA 6297 from Flagstaff at the gate
14:20DL 1697 to Boston leaves the gate
18 h 12 apart on the timetable, overnight
DL 1697 leaves 18 h 12 after AA 6297 arrives on the timetable: more than half a day, so not a connection we count.