DL 873 then UA 2077 at DFW
New York LaGuardia → Dallas-Fort Worth → Denver
Timetable, Dallas-Fort Worth time
20:23DL 873 from New York LaGuardia at the gate
16:55UA 2077 to Denver leaves the gate
20 h 32 apart on the timetable, overnight
UA 2077 leaves 20 h 32 after DL 873 arrives on the timetable: more than half a day, so not a connection we count.