AA 4538 then UA 2394 at Boston
New York LaGuardia → Boston → Newark
Timetable, Boston time
09:42AA 4538 from New York LaGuardia at the gate
10:30UA 2394 to Newark leaves the gate
48 min apart on the timetable
The last days
AA 4538 and UA 2394 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.