AS 565 then UA 235 at San Francisco
Las Vegas → San Francisco → Houston
Timetable, San Francisco time
13:59AS 565 from Las Vegas at the gatealso QF 3749, DE 5012, AA 7625
18:00UA 235 to Houston leaves the gate
4 h 01 apart on the timetable
The last days
AS 565 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.