[Zombieball]

You just need to look for flight sales (like you would for an economy ticket).

Example:

JFK to FRA, business class, A380 lie flat: $1,996USD

https://www.flyertalk.com/forum/premium-fare-deals/1894422-s...

That’s only a 2.3x multiple of the $875 economy fare.

[willyt]

Norwegian is ~$200 single New York - London