I get to LA at 11:30 is the USO actually 24 hours because I have a flight the next morning and I’m active duty Marine Corp just wondering

It's 24/7 365

And it is a great place to relax

Yes

Yes, it's always open

Where is uso in the airpprt

I've only been there during the day, but I'm sure it is. They usually have food ready and there's a place to pass out for a few hours if you really need to.

Yes open 24/7 they have showers too and free food and refreshments plus an area to get some shut eye and decompress very quiet and clean environment too