I have a 7:50PM (on a Tuesday) international departure from LAX, so I'd like to arrive at LAX by 5:50PM. I'm arriving at Union Station on an Amtrak train scheduled to arrive at 4:25PM. I'm hoping it will be on time, and that I can run and get on the 4:30 flyaway bus to LAX. If I miss it, I was considering taking metro rail to LAX rather than waiting for the 5:00 flyaway. I have the following questions:
1) How likely am I to make the 4:30 flyaway, considering such factors as likelihood of on-time Amtrak arrival, timely departure of the flyaway, and how long it takes to get from the train to the flyaway departure point at Union Station?
2) Which mode of transport (metro or flyaway) is generally quicker at this time of day? I've seen flyaway estimates of from 30 minutes to over an hour -- I assume an hour is more likely at rush hour. The Metro Trip Planner quotes trip times for specific itineraries of just under an hour, but the page that summarizes possible routes says 60-90 minutes -- where would that much variability come from on Metro rail?
3) How long would it take to walk from the Aviation/LAX Metro green line stop to terminal 4, or is there a shuttle bus?
4) Is there any problem taking small luggage (1 carry-on and a small backpack) on Metro rail?