AA 517 then UA 2831 at San Francisco
Chicago O'Hare → San Francisco → Houston
Timetable, San Francisco time
11:11AA 517 from Chicago O'Hare at the gatealso QF 4687
14:30UA 2831 to Houston leaves the gate
3 h 19 apart on the timetable
The last days
AA 517 and UA 2831 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.