UA 3501 then DL 1940 at O'Hare
Kansas City → Chicago → Salt Lake City
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
14:03DL 1940 to Salt Lake City leaves the gate
20 h 58 apart on the timetable, overnight
DL 1940 leaves 20 h 58 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.