UA 728 then AA 1044 at DFW
Denver → Dallas-Fort Worth → Louisville
Timetable, Dallas-Fort Worth time
16:39UA 728 from Denver at the gate
09:39AA 1044 to Louisville leaves the gate
17 h apart on the timetable, overnight
AA 1044 leaves 17 h after UA 728 arrives on the timetable: more than half a day, so not a connection we count.