UA 5209 then AA 3456 at O'Hare
Washington → Chicago → Toronto Pearson
Timetable, Chicago time
07:30UA 5209 from Washington at the gate
20:45AA 3456 to Toronto Pearson leaves the gate
13 h 15 apart on the timetable
AA 3456 leaves 13 h 15 after UA 5209 arrives on the timetable: more than half a day, so not a connection we count.