BA 295 then QF 7554 at O'Hare
London → Chicago → Dallas-Fort Worth
Timetable, Chicago time
13:45BA 295 from London at the gate
13:37QF 7554 to Dallas-Fort Worth leaves the gate
23 h 52 apart on the timetable, overnight
QF 7554 leaves 23 h 52 after BA 295 arrives on the timetable: more than half a day, so not a connection we count.