There are 3 ferry routes operating between St Barts and St Martin offering you combined total of 51 sailings per week. Great Bay Express operates 1 route, Gustavia to Philipsburg which runs 15 times weekly. Voyager operates 2 routes, Gustavia to Marigot runs 13 times per week & Gustavia to Oyster Pond about 23 times weekly.
As the frequency and duration of crossings on some routes varies we would advise that you do a live search for crossings from St Barts to St Martin to get the most up to date information.