DL 343 then DL 2423 at Atlanta
Washington National → Atlanta → Oklahoma City
Timetable, Atlanta time
09:55DL 343 from Washington National at the gate
22:40DL 2423 to Oklahoma City leaves the gate
12 h 45 apart on the timetable
DL 2423 leaves 12 h 45 after DL 343 arrives on the timetable: more than half a day, so not a connection we count.