F9 1323 then UA 5845 at Denver
Dallas-Fort Worth → Denver → Billings
Timetable, Denver time
14:04F9 1323 from Dallas-Fort Worth at the gate
13:38UA 5845 to Billings leaves the gate
23 h 34 apart on the timetable, overnight
UA 5845 leaves 23 h 34 after F9 1323 arrives on the timetable: more than half a day, so not a connection we count.