OS 45 then QF 7554 at O'Hare
Vienna → Chicago → Dallas-Fort Worth
Timetable, Chicago time
14:00OS 45 from Vienna at the gate
13:37QF 7554 to Dallas-Fort Worth leaves the gate
23 h 37 apart on the timetable, overnight
QF 7554 leaves 23 h 37 after OS 45 arrives on the timetable: more than half a day, so not a connection we count.