AA 5310 then AA 1550 at Philadelphia
Grand Rapids → Philadelphia → Houston
Timetable, Philadelphia time
08:55AA 5310 from Grand Rapids at the gate
12:28AA 1550 to Houston leaves the gate
3 h 33 apart on the timetable
The last days
AA 5310 and AA 1550 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.