WN 347 then UA 558 at Denver
Birmingham (Alabama) → Denver → Boston
Timetable, Denver time
18:45WN 347 from Birmingham (Alabama) at the gate
07:50UA 558 to Boston leaves the gate
13 h 05 apart on the timetable, overnight
UA 558 leaves 13 h 05 after WN 347 arrives on the timetable: more than half a day, so not a connection we count.