DL 1697 then YX 4801 at Boston
Phoenix → Boston → St Louis
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
10:15YX 4801 to St Louis leaves the gate
13 h 15 apart on the timetable, overnight
YX 4801 leaves 13 h 15 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.