WN 996 then OO 309 at Denver
Baltimore → Denver → Sioux Falls
Timetable, Denver time
21:10WN 996 from Baltimore at the gate
21:05OO 309 to Sioux Falls leaves the gate
23 h 55 apart on the timetable, overnight
OO 309 leaves 23 h 55 after WN 996 arrives on the timetable: more than half a day, so not a connection we count.