UA 1607 then WN 1749 at Denver
Indianapolis → Denver → Dallas
Timetable, Denver time
08:59UA 1607 from Indianapolis at the gate
06:05WN 1749 to Dallas leaves the gate
21 h 06 apart on the timetable, overnight
WN 1749 leaves 21 h 06 after UA 1607 arrives on the timetable: more than half a day, so not a connection we count.