WN 757 then WN 451 at Denver
Cleveland → Denver → Tulsa
Timetable, Denver time
18:45WN 757 from Cleveland at the gate
17:35WN 451 to Tulsa leaves the gate
22 h 50 apart on the timetable, overnight
WN 451 leaves 22 h 50 after WN 757 arrives on the timetable: more than half a day, so not a connection we count.