I am travelling with my 7 months pregnant wife and a 2 yr old child to Las Vegas. I am planning to take the domestic flight operated by United Airlines from LAX to Las Vegas. I am arriving into LAX by China Airlines at 7.10pm and my domestic flight operated by United Airlines depart terminal 7/8 at 10.20pm on the same night. Can anyone kindly advise if the gap of about 3 hrs is enough to clear the immigration and security clearance and check in for my domestic flight? I heard it takes quite a long time to clear the custom check in LAX. Do they have any priority lane for families with children like some airports in the world?