UA 656 then LY 4189 at Newark
Chicago → New York → Boston
Timetable, New York time
09:07UA 656 from Chicago at the gate
14:10LY 4189 to Boston leaves the gate
5 h 03 apart on the timetable
The last days
UA 656 and LY 4189 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.