WN 818 then AA 1466 at Denver
Buffalo → Denver → Chicago O'Hare
Timetable, Denver time
18:35WN 818 from Buffalo at the gate
18:11AA 1466 to Chicago O'Hare leaves the gate
23 h 36 apart on the timetable, overnight
AA 1466 leaves 23 h 36 after WN 818 arrives on the timetable: more than half a day, so not a connection we count.