DL 3901 then DL 2671 at Salt Lake City
Helena → Salt Lake City → Austin
Timetable, Salt Lake City time
08:38DL 3901 from Helena at the gate
07:45DL 2671 to Austin leaves the gate
23 h 07 apart on the timetable, overnight
DL 2671 leaves 23 h 07 after DL 3901 arrives on the timetable: more than half a day, so not a connection we count.