DL 2601 then UA 4500 at Detroit
Baltimore → Detroit → Washington
Timetable, Detroit time
07:42DL 2601 from Baltimore at the gate
19:45UA 4500 to Washington leaves the gate
12 h 03 apart on the timetable
UA 4500 leaves 12 h 03 after DL 2601 arrives on the timetable: more than half a day, so not a connection we count.