Is Amtrak cheaper round trip?
Also: Round-trip fares are cheaper, too, on Amtrak, but the margin is much smaller. I found prices to be around $100 cheaper on average.
How much does it cost to take a train across the country?
Turns out, you don’t need a car to see America. Traveling coast-to-coast across the United States by train is one of the world’s greatest travel experiences. Amazingly, it’s also one of the world’s greatest travel bargains — the 3,400-mile trip can cost as little as $186.