Driving from Florida? Hertz offers special rental rates from $2 USD/day when booked in February and $3/day when booked in March. Travel from March 24 to June 30. Mention RQ code 1WAY.
If you're willing to take the bus in North America, Greyhound offers Go Anywhere fares starting at $29 USD one-way and $58 round trip when purchased at least a week in advance. Prices increase by length of trip.
Amtrak updates a list of weekly specials throughout the spring. Specials listed are usually good for at least a week or two, so this is an option for last-minute trips.
If you're under 26 and interested in train travel, Rail Europe offers specials on Youth Passes There is a huge selection of options available. Some people will buy passes simply for the convenience, but don't pay too much for the privilege. Check the cost of your itinerary this spring using point-to-point ticket purchases.
