F9 1342 then UA 576 at O'Hare
Dallas-Fort Worth → Chicago → Los Angeles
Timetable, Chicago time
15:31F9 1342 from Dallas-Fort Worth at the gate
15:00UA 576 to Los Angeles leaves the gate
23 h 29 apart on the timetable, overnight
UA 576 leaves 23 h 29 after F9 1342 arrives on the timetable: more than half a day, so not a connection we count.