TP 8487 then UA 3547 at Newark
Chicago → New York → Boston
Timetable, New York time
15:15TP 8487 from Chicago at the gate
16:25UA 3547 to Boston leaves the gate
1 h 10 apart on the timetable
The last days
TP 8487 and UA 3547 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.