WN 1670 then UA 736 at Boston
Denver → Boston → Newark
Timetable, Boston time
01:15WN 1670 from Denver at the gate
08:20UA 736 to Newark leaves the gate
7 h 05 apart on the timetable
The last days
WN 1670 and UA 736 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.