When you ask a generalized, vague, loaded question, you're going to get some honest, humerous answers in return.
With gas prices soaring, and expected to possibly reach $5-$6 a gallon by next year, it's highly doubtful that you will be finding any "cheap" travel anytime soon.
F-mattox was being realistic. Right about now your "cheapest" options are walk, run, hitch, bicycle, or swim.
Unless gas is $1.20 a gallon where you live. Then, by all means, please let us in on your location.