Glad to hear that, but Spirit is known to charge for everything that other airlines may include. Even carry-on items that typically are free of charge. Also, they don't connect to St. Maarten directly, so you would have to find another airline (like Jet Blue) that could finish the journey. The timing of this can be tricky, and might require an overnight stay. But, it's good to investigate all options when dealing with the airlines these days. I would still suggest Toronto as a primary option to DTW, especially since you reside in Port Huron. The airport is roughly 170 miles away, so a three hour journey to save that amount of money is worth the travel.