UA 2016 then YX 3287 at Dulles
Portland (Oregon) → Washington → Dayton
Timetable, Washington time
16:22UA 2016 from Portland (Oregon) at the gate
12:35YX 3287 to Dayton leaves the gate
20 h 13 apart on the timetable, overnight
YX 3287 leaves 20 h 13 after UA 2016 arrives on the timetable: more than half a day, so not a connection we count.