UA 493 then WN 1749 at Denver
San Francisco → Denver → Dallas
Timetable, Denver time
12:44UA 493 from San Francisco at the gate
05:35WN 1749 to Dallas leaves the gate
16 h 51 apart on the timetable, overnight
WN 1749 leaves 16 h 51 after UA 493 arrives on the timetable: more than half a day, so not a connection we count.