DL 856 then UA 1401 at DFW
New York LaGuardia → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
13:14DL 856 from New York LaGuardia at the gate
12:36UA 1401 to Chicago O'Hare leaves the gate
23 h 22 apart on the timetable, overnight
UA 1401 leaves 23 h 22 after DL 856 arrives on the timetable: more than half a day, so not a connection we count.