AA 2903 then UA 3610 at Boston
Philadelphia → Boston → Newark
Timetable, Boston time
08:40AA 2903 from Philadelphia at the gate
19:00UA 3610 to Newark leaves the gate
10 h 20 apart on the timetable
The last days
AA 2903 and UA 3610 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.