WN 347 then UA 2271 at Denver
Birmingham (Alabama) → Denver → Seattle
Timetable, Denver time
18:45WN 347 from Birmingham (Alabama) at the gate
07:40UA 2271 to Seattle leaves the gate
12 h 55 apart on the timetable, overnight
UA 2271 leaves 12 h 55 after WN 347 arrives on the timetable: more than half a day, so not a connection we count.