I would wait since there are quite a few seats left on those Saturday flights with most of the "Economy Plus" seats empty.

I have gotten into the habit of checking one way fares since a lot of the time one leg is the culprit. If the price is low I grab one leg. I then just have half to worry about.

For example I checked May 16th/23rd for fares and it was $583 for the n/s r/t..but..it was $207 for the EWR-SXM leg. I would grab that in a heartbeat and cut my needs in half.

I did the same for my SXM trip starting this Sunday...booked the return n/s 1st when it was cheap...and then booked the SJU connection down when the fare dropped a tad.

I should also add that the n/s flights "disappeared" when I returned for a 3rd time in 10 minutes to check seats...so not seeing a flight doesn't mean it's not there...restart your computer or clear your cache/history and they will magically reappear.