AS 2123 then DL 9964 at Seattle
Boise → Seattle → Salt Lake City
Timetable, Seattle time
18:57AS 2123 from Boise at the gate
12:00DL 9964 to Salt Lake City leaves the gate
17 h 03 apart on the timetable, overnight
DL 9964 leaves 17 h 03 after AS 2123 arrives on the timetable: more than half a day, so not a connection we count.