UA 445 then WN 4673 at Boston
Denver → Boston → Baltimore
Timetable, Boston time
23:50UA 445 from Denver at the gate
08:40WN 4673 to Baltimore leaves the gate
8 h 50 apart on the timetable, overnight
The last days
UA 445 and WN 4673 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.