DL 5701 then UA 4500 at Detroit
Columbus (Ohio) → Detroit → Washington
Timetable, Detroit time
07:40DL 5701 from Columbus (Ohio) at the gate
19:45UA 4500 to Washington leaves the gate
12 h 05 apart on the timetable
UA 4500 leaves 12 h 05 after DL 5701 arrives on the timetable: more than half a day, so not a connection we count.