DL 5653 then UA 723 at Boston
Columbus (Ohio) → Boston → Houston
Timetable, Boston time
19:42DL 5653 from Columbus (Ohio) at the gate
17:17UA 723 to Houston leaves the gate
21 h 35 apart on the timetable, overnight
UA 723 leaves 21 h 35 after DL 5653 arrives on the timetable: more than half a day, so not a connection we count.