To be honest my job changed during the pandemic so I have not made the trip in several years. Before making my post I went on the Amtrak website and priced out a trip in mid October. It was about $225 each way before tax etc. If you were willing to get on the 6am train it was a few bucks cheaper. I'm happy to concede that you could get better deals booking further out etc, I didn't spend time checking.

Hell, I'd love to be wrong. Because again, I enjoy traveling by rail. If I somehow accidentally priced the literal worst case, that's good to know.