AA 9928 then UA 1673 at O'Hare
New York LaGuardia → Chicago → Dallas-Fort Worth
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
20:22UA 1673 to Dallas-Fort Worth leaves the gate
13 h 37 apart on the timetable
UA 1673 leaves 13 h 37 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.