DL 5619 then BA 212 at Boston
Milwaukee → Boston → London
Timetable, Boston time
22:02DL 5619 from Milwaukee at the gate
18:35BA 212 to London leaves the gate
20 h 33 apart on the timetable, overnight
BA 212 leaves 20 h 33 after DL 5619 arrives on the timetable: more than half a day, so not a connection we count.