UA 3280 then AA 4540 at Houston
Lubbock → Houston → Chicago
Timetable, Houston time
13:21UA 3280 from Lubbock at the gate
18:48AA 4540 to Chicago leaves the gate
5 h 27 apart on the timetable
The last days
UA 3280 and AA 4540 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.