Very large, what looked like a Boeing 737 or that of the sort just departed Antigua in the Caribbean headed south west. No windows, no decals. Just an all white plane. It was not on AIS. Any ideas?

Very large, what looked like a Boeing 737 or that of the sort just departed Antigua in the Caribbean headed south west. No windows, no decals. Just an all white plane. It was not on AIS. Any ideas? [link]