re: Best use out of Chase Sapphire Card

Well, I had to sort of guess how long you were staying.

I tried booking award travel through United, which should also check all the Star Alliance companies, and found nothing particularly good there.

Checked Delta, which has award flights from MSY to UVF for 55,000 points plus $60 in taxes. Dates were March 8 to March 16 2014. Again, I have no idea what dates you are looking for. Also looks like some massive layovers, but there was a 65,000 point option that didn't have that.

You'd have to transfer your points from Chase to Korean Airlines and then book, since Korean is a Chase partner that is part of Skyteam with Delta.

I stopped looking after finding this. As its a lot of effort to try to find the best deal. Again I suggest you learning more about the program.