LF 8443 then UA 3464 at O'Hare
MQY → Chicago → Pittsburgh
Timetable, Chicago time
09:24LF 8443 from MQY at the gate
21:30UA 3464 to Pittsburgh leaves the gate
12 h 06 apart on the timetable
UA 3464 leaves 12 h 06 after LF 8443 arrives on the timetable: more than half a day, so not a connection we count.