DL 716 then UA 731 at Denver
New York LaGuardia → Denver → Buffalo
Timetable, Denver time
17:35DL 716 from New York LaGuardia at the gate
17:25UA 731 to Buffalo leaves the gate
23 h 50 apart on the timetable, overnight
UA 731 leaves 23 h 50 after DL 716 arrives on the timetable: more than half a day, so not a connection we count.