DL 905 then AA 5456 at Atlanta
Salt Lake City → Atlanta → Philadelphia
Timetable, Atlanta time
23:35DL 905 from Salt Lake City at the gate
13:31AA 5456 to Philadelphia leaves the gate
13 h 56 apart on the timetable, overnight
AA 5456 leaves 13 h 56 after DL 905 arrives on the timetable: more than half a day, so not a connection we count.