DL 1697 then B6 1215 at Boston
Phoenix → Boston → Buffalo
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
09:30B6 1215 to Buffalo leaves the gate
12 h 30 apart on the timetable, overnight
B6 1215 leaves 12 h 30 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.