you could take the GO shuttle to Miami Beach, (corner of 41st street and Alton rd) then pick up the airport flyer bus at the corner, which runs approximately every half hour (check Google maps for schedule)... costs about $21 for the shuttle and $2.65 for bus... bus is #150 and is express from there to airport... also there are a bunch of kosher restaurants, a kosher market, and a synagogue nearby if that would be of use to you (just a guess since you're LY matmid)
