I'm planning a 1 month trip to the states next year with my 17 year old, i visited back in the 90's and for $450 i had 1 months unlimited standby travel within the USA with Delta .
1. Do these type of standby tickets still exist?
2. What would be my best bet for internal travel on a limited budget?
3. What is a good search engine for low cost internal flights?
4. Do the rail companies offer competitive prices and have a good network?
My itinery could be something like NY - MIAMI - NEW ORLEANS - S. FRANCISCO - LAS VEGAS (GRAND CANYON) - NY.