DL 2535 then UA 3309 at Detroit
West Palm Beach → Detroit → Louisville
Timetable, Detroit time
18:15DL 2535 from West Palm Beach at the gate
17:12UA 3309 to Louisville leaves the gate
22 h 57 apart on the timetable, overnight
UA 3309 leaves 22 h 57 after DL 2535 arrives on the timetable: more than half a day, so not a connection we count.