F9 1279 then WN 1749 at Denver
Miami → Denver → Dallas
Timetable, Denver time
08:29F9 1279 from Miami at the gate
05:35WN 1749 to Dallas leaves the gate
21 h 06 apart on the timetable, overnight
WN 1749 leaves 21 h 06 after F9 1279 arrives on the timetable: more than half a day, so not a connection we count.