Try Primetimeshuttle.com I have used them numerous times and they have always been great - professional, on time, reasonably priced. I like the idea of a fixed price upfront, rather than a cab that can get costly if you get caught in traffic.
A good friend will bail you out of jail. A true friend will be sitting next to you saying "Damn, that was fun!"
Sailed on Monarch of the Seas from this port. If you're flying in the same day the ship sails, some type of "arranged" transportation is good; however, if you wanted to rent a car, here's what I did. Budget-Rent-A-Car has a office in LAX and in Long Beach, CA. You can drive the car one-way from LAX to the satilite office in Long Beach, CA to drop it off. No additional fees are associated with a drop off at this location. They then have a free shuttle to take you to pier (about a 10 min ride from their office). On the way home, you can have them pick you up at the pier and bring you to their office for free to re-rent a car to get yourself back to LAX. Good Luck!
Paul's right. Even though they are only 8.5 miles apart it does take about 15 sometimes 20 minutes depending on traffic to get from one to the other. Good thing to know about Budget too since Enterprise, which is closest to San Pedro is closed on Sundays.
Teresa and Larry
#36-Carnival Splendor 9/16/12
7 night Mexican Riviera
#37-Allure of the Seas 11/11/12
7 night Eastern Caribbean
Take a cab or hire a service to get you there
It's a vacation,enjoy it
I live in So Calif. and have been there many times
There are a few wrong turns you can make very easy
One will cost a toll to cross the bridge