UA 3884 then BA 296 at O'Hare
Melbourne (Florida) → Chicago → London
Timetable, Chicago time
01:06UA 3884 from Melbourne (Florida) at the gate
21:50BA 296 to London leaves the gate
20 h 44 apart on the timetable
BA 296 leaves 20 h 44 after UA 3884 arrives on the timetable: more than half a day, so not a connection we count.