Generally if you are flying to the Carribbean during the busy months to one of the more popular islands. (MBJ, BGI, NAS, even UVF last fall) you may get a 763 or even a 333 during the March break. My last couple of flights to MBJ and UVF last summer and fall were on 763's (the 2-2-1's too boot).

Heading to CUN tomorrow. My return is direct so it will be on a pitiful 320. Probably one of the old tango one's with my luck.