UA 6223 then AA 5220 at Dulles
South Bend → Washington → Charlotte
Timetable, Washington time
11:50UA 6223 from South Bend at the gate
11:48AA 5220 to Charlotte leaves the gate
23 h 58 apart on the timetable, overnight
AA 5220 leaves 23 h 58 after UA 6223 arrives on the timetable: more than half a day, so not a connection we count.