WN 1555 then AA 1688 at Boston
Denver → Boston → Charlotte
Timetable, Boston time
01:15WN 1555 from Denver at the gate
08:00AA 1688 to Charlotte leaves the gate
6 h 45 apart on the timetable
The last days
WN 1555 and AA 1688 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.