UA 3264 then AA 555 at Houston
Brownsville → Houston → Chicago
Timetable, Houston time
18:00UA 3264 from Brownsville at the gate
18:55AA 555 to Chicago leaves the gate
55 min apart on the timetable
The last days
UA 3264 and AA 555 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.