Yes they do exist!!! Just received info from Norwegian about new long-haul flights and one of them is Gatwick to Puerto Rico. Cheapest outbound is £159 and inbound £91.

I presume these are start-up fares so won't last long so book soon... http://www.norwegian.com/uk

Mike, those are stunning prices, plus the onward connections are also cheap compared to LIAT. Worth getting an American visa for. Unfortunately we aren't able to book for a while. Let's hope when things get resolved it's still out there. Looked at March and still in the same sort of bracket.

I haven't seen prices like those in many years! Thanks Mike.