WN 3525 then AA 1277 at Denver
Chicago Midway → Denver → Chicago O'Hare
Timetable, Denver time
20:20WN 3525 from Chicago Midway at the gate
14:30AA 1277 to Chicago O'Hare leaves the gate
18 h 10 apart on the timetable, overnight
AA 1277 leaves 18 h 10 after WN 3525 arrives on the timetable: more than half a day, so not a connection we count.