DL 2173 then DL 9969 at Salt Lake City
Boise → Salt Lake City → Los Angeles
Timetable, Salt Lake City time
07:15DL 2173 from Boise at the gate
19:30DL 9969 to Los Angeles leaves the gate
12 h 15 apart on the timetable
DL 9969 leaves 12 h 15 after DL 2173 arrives on the timetable: more than half a day, so not a connection we count.