DL 3734 then UA 2131 at Atlanta
Jacksonville (North Carolina) → Atlanta → Washington
Timetable, Atlanta time
20:24DL 3734 from Jacksonville (North Carolina) at the gate
19:34UA 2131 to Washington leaves the gate
23 h 10 apart on the timetable, overnight
UA 2131 leaves 23 h 10 after DL 3734 arrives on the timetable: more than half a day, so not a connection we count.