G7 3375 then QF 3303 at O'Hare
St Louis → Chicago → Toronto Pearson
Timetable, Chicago time
08:23G7 3375 from St Louis at the gate
20:45QF 3303 to Toronto Pearson leaves the gate
12 h 22 apart on the timetable
QF 3303 leaves 12 h 22 after G7 3375 arrives on the timetable: more than half a day, so not a connection we count.