DL 3913 then DL 4039 at Seattle
Portland (Oregon) → Seattle → Bozeman
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
20:21DL 4039 to Bozeman leaves the gate
23 h 31 apart on the timetable, overnight
DL 4039 leaves 23 h 31 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.