DL 920 then TP 4392 at San Francisco
Salt Lake City → San Francisco → Boston
Timetable, San Francisco time
08:53DL 920 from Salt Lake City at the gatealso VS 4456, KE 6746, MU 8721
06:00TP 4392 to Boston leaves the gate
21 h 07 apart on the timetable, overnight
TP 4392 leaves 21 h 07 after DL 920 arrives on the timetable: more than half a day, so not a connection we count.