UA 358 then AA 1974 at DFW
Houston → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
08:46UA 358 from Houston at the gate
06:12AA 1974 to Chicago O'Hare leaves the gate
21 h 26 apart on the timetable, overnight
AA 1974 leaves 21 h 26 after UA 358 arrives on the timetable: more than half a day, so not a connection we count.