Welcome aboard, Cailyn! It's great timing that you're asking this question, because I am currently planning my
Disney Wonder sailing out of
San Diego for this fall, and have been deciding on transportation too! We have sailed the
Mexican Riviera from Southern California with Disney before and let me tell you - it is beautiful! You are in for such an amazing cruise! I can't wait to experience it again this fall!
You can certainly book
ground transfers through Disney Cruise Line from the San Diego airport to the cruise port even if you're not flying in. Give the agents at Disney a call at (800) 951-3532 (or your travel agent) to add the ground transfers to your cruise reservations. They'll be happy to do that for you. The San Diego airport is super close to the cruise port, so it's a very quick ride over, and you may find that a taxi is an easy and inexpensive option too, though it is very nice to simply let Disney just take care of the details so you can just show up and let them whisk you away to a magical vacation and back!
Have fun as you plan this exciting trip, and please stop back if we can help with any other questions before you set sail, Cailyn!
Marcy