F9 1500 then WN 1749 at Denver
Ontario → Denver → Dallas
Timetable, Denver time
09:51F9 1500 from Ontario at the gate
05:35WN 1749 to Dallas leaves the gate
19 h 44 apart on the timetable, overnight
WN 1749 leaves 19 h 44 after F9 1500 arrives on the timetable: more than half a day, so not a connection we count.