Took the Metrolink to Downtown Los Angeles to connect to flyaway to LAX. I discovered this route to get to LAX a few years ago. It is way worth it if you can instead of having someone drive you all the way to LAX. The traffic around LAX can be horrendous.
Took a few pictures while waiting and while on the train. If you never took the train before I think it is worth a try, we have taken the train just for a day trip to Los Angeles. They have a nice and friendly snack bar.