[ghaff]

That sounds more like what I'd pay for a round-trip economy ticket to Europe and there are probably going to be other costs for lodging etc. associated with the ship. But, fair enough, like (sometimes) long distance train, air isn't necessarily hugely cheaper.

(And, yes, business or first class that you actually pay directly out of pocket for is priced like a luxury good. Of course, you can pay a lot more for the cabin too.)