UA 3902 then UA 3902 at Houston
Toronto → Houston → Newark
Timetable, Houston time
08:27UA 3902 from Toronto at the gate
11:00UA 3902 to Newark leaves the gate
2 h 33 apart on the timetable
The last days
UA 3902 and UA 3902 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.