UA 2410 then DL 4446 at Salt Lake City
Washington → Salt Lake City → Boise
Timetable, Salt Lake City time
20:56UA 2410 from Washington at the gate
20:40DL 4446 to Boise leaves the gate
23 h 44 apart on the timetable, overnight
DL 4446 leaves 23 h 44 after UA 2410 arrives on the timetable: more than half a day, so not a connection we count.