Do not desire to fly or drive to san diego. California from Tennessee. Are there other methods for travel to san diego, California?

Bus, (but that is driving, although someone else is driving)

Train.

You can walk... but that's going to take a lot longer. Unless you can find a Burro to ride.

Hitch hiking, bus, train, bicycle.

Train is good

Trains are limited, depending on their exact location, There are only a few lines for passengers in America

Boat!

Take the train or Greyhound bus. Once you get to San Diego there are many modes of transportation.