WN 3300 then UA 397 at Denver
Ontario → Denver → Portland (Maine)
Timetable, Denver time
10:15WN 3300 from Ontario at the gate
10:11UA 397 to Portland (Maine) leaves the gate
23 h 56 apart on the timetable, overnight
UA 397 leaves 23 h 56 after WN 3300 arrives on the timetable: more than half a day, so not a connection we count.