UA 1564 then AA 3816 at DFW
Washington → Dallas-Fort Worth → Columbia Metropolitan
Timetable, Dallas-Fort Worth time
15:14UA 1564 from Washington at the gate
13:15AA 3816 to Columbia Metropolitan leaves the gate
22 h 01 apart on the timetable, overnight
AA 3816 leaves 22 h 01 after UA 1564 arrives on the timetable: more than half a day, so not a connection we count.