UA 4909 then SY 8405 at Houston
Huntsville → Houston → Atlanta
Timetable, Houston time
13:23UA 4909 from Huntsville at the gate
18:30SY 8405 to Atlanta leaves the gate
5 h 07 apart on the timetable
The last days
UA 4909 and SY 8405 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.