There are lots of ways to get to HI-Los Angeles/Santa Monica
From LAX Los Angeles International Airport:
Taxis available or Super Shuttles are available outside baggage claim or Public Transportation: Take Airport Shuttle Bus "C" to City Bus Terminal where you will board Big Blue Bus #3 (Lincoln Blvd) and take it to 2nd and Broadway in Santa Monica, walk 1/2 block north to the hostel.
From Union Station (Amtrak):
Take the MTA bus #33 from Los Angeles and Arcadia Streets to 2nd and Broadway in Santa Monica, walk 1/2 block north to the hostel.
From the Greyhound Bus Station:
Take MTA bus #60 west to 7th and Springs Streets, (asking and paying for a transfer when you get on the bus,) then transfer to bus #33 and take to 2nd and Broadway in Santa Monica, walk 1/2 block noreth to the hostel.
The hostel is open 24 hours. When in the US, the hostel can be reached toll free for reservations or information at 1 (888) GO-HIUSA, extension 137 or 1 (888) 464-4872, extension 137.