UA 1087 then DL 751 at Denver
San José (Costa Rica) → Denver → New York LaGuardia
Timetable, Denver time
12:15UA 1087 from San José (Costa Rica) at the gate
11:20DL 751 to New York LaGuardia leaves the gate
23 h 05 apart on the timetable, overnight
DL 751 leaves 23 h 05 after UA 1087 arrives on the timetable: more than half a day, so not a connection we count.