How to travel to Grand Canyon from San Diego, I don't want to fly or drive.. is there like a train or travels?

Through Amtrak's website, you can see what the train (with some bus connections) would be. It looks like it would be an overnight trip. You'd go from San Diego to LA (on the Pacific Surfliner Train) to Williams Junction, AZ (on the Southwest Chief Train) to the Grand Canyon (via a bus and train connection). Looks like it will run you under $300 for roundtrip. The Southwest Chief would be the bulk of your trip. That's a really nice train with an observation car, dining car, etc. Only downside is you have to get off in Williams Junction at 4:00 a.m. Good luck with your trip. Hope this helps!

I am wanting to do this trip also and I have found that it is alot cheaper to go from las vegas. This site has busses which will take u from Cali - Las Vegas as a reasonable price, around $70.
http://www.luxbusamerica.com/bus-schedule-pricing.php?gclid=CMHWtvzp54sCFSYcEAodlzSnOg
From Las Vegas U can get trips fairly cheap. Do a search on google from trips departing from Las Vegas. On the Grand Canyon website there are buy one get 1 free tickets, which must be bought in May i think, and the trip must part by the end of June. I think that works out at around $79 each if there are 2 of u.
Have a good time! x