WN 757 then WN 769 at Denver
Cleveland → Denver → Boston
Timetable, Denver time
18:45WN 757 from Cleveland at the gate
17:55WN 769 to Boston leaves the gate
23 h 10 apart on the timetable, overnight
WN 769 leaves 23 h 10 after WN 757 arrives on the timetable: more than half a day, so not a connection we count.