UA 3908 then FX 1388 at O'Hare
Columbus (Ohio) → Chicago → Memphis
Timetable, Chicago time
09:34UA 3908 from Columbus (Ohio) at the gate
22:00FX 1388 to Memphis leaves the gate
12 h 26 apart on the timetable
FX 1388 leaves 12 h 26 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.