B6 has announced new Saturday Mint Service on the BOS-SXM route beginning on February 16, 2019. My recollection is that B6 has had non-stop BOS-SXM service pre-Irma, but that their planned upgrade to Mint service was cancelled due to Irma.

Saturday Mint Schedule between Boston (BOS) and St. Maarten (SXM)
Beginning February 16, 2019

BOS - SXM Flight # 77 SXM - BOS Flight # 78
7:10 a.m. – 12:20 p.m. 1:45 p.m. – 5:17 p.m.

Here's a link to the entire Press Release, which includes other Mint service to other cities.

http://blueir.investproductions.com/investor-relations/press-releases/2018/07-26-2018-150011126