UA 3377 then FX 1205 at O'Hare
Pittsburgh → Chicago → Memphis
Timetable, Chicago time
08:30UA 3377 from Pittsburgh at the gate
21:20FX 1205 to Memphis leaves the gate
12 h 50 apart on the timetable
FX 1205 leaves 12 h 50 after UA 3377 arrives on the timetable: more than half a day, so not a connection we count.