AA 3176 then UA 1593 at San Francisco
Los Angeles → San Francisco → Houston
Timetable, San Francisco time
14:13AA 3176 from Los Angeles at the gatealso QF 4743
23:15UA 1593 to Houston leaves the gatealso EK 6028, NZ 9192
9 h 02 apart on the timetable
The last days
AA 3176 and UA 1593 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.
Later flights to Houston
UA 50523:599 h 46 after AA 3176 on the timetable