DL 3859 then DL 1260 at Salt Lake City
Great Falls → Salt Lake City → San Jose (California)
Timetable, Salt Lake City time
15:01DL 3859 from Great Falls at the gate
15:00DL 1260 to San Jose (California) leaves the gate
23 h 59 apart on the timetable, overnight
DL 1260 leaves 23 h 59 after DL 3859 arrives on the timetable: more than half a day, so not a connection we count.