UA 2255 then WN 3748 at Denver
Hayden → Denver → Burbank
Timetable, Denver time
08:15UA 2255 from Hayden at the gate
20:25WN 3748 to Burbank leaves the gate
12 h 10 apart on the timetable
WN 3748 leaves 12 h 10 after UA 2255 arrives on the timetable: more than half a day, so not a connection we count.