Originally Posted by
FlyerTalkUserName
Aha, this is what I was looking for. Could be tricky to get four of these since they appear to be one-way, but definitely opens up more options. EDIT: after quickly looking it appears NAS-GCM is operated in both directions. Not sure if that applies to all the rest.
Be sure to check the days those 5th freedom flights operate as they are not daily. I've also not found them easy to book AND you have to get to/from the Caribbean destination to actually take the flight.
From FL, a simple r/t to/from any where in Europe on BA/AA/IB (4 flights/qualifying) should be easier and less-risky in case of a delay or cancellation. Don't forget IB-operated flights with an IB flight number count too.