SK 9502 then UA 235 at San Francisco
Mexico City → San Francisco → Houston
Timetable, San Francisco time
11:38SK 9502 from Mexico City at the gate
18:00UA 235 to Houston leaves the gate
6 h 22 apart on the timetable
The last days
SK 9502 and UA 235 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.