Is that round-trip? I looked on Kayak and a round-trip flight tomorrow is at least $300. I don't think the busses and trains get so much more expensive at the last minute, but I could be wrong.
I used to always price Amtrak out for my various domestic trips, because I think the train is cool. But it was always way more expensive than flying. (The only people I know now that ride Amtrak are those with irrational fears of flying. And I say this with great regret, because I am a huge railfan.)