Grant, I don't know what time you get in to Cancun Airport, but I would take the bus from the airport to Playa del Carmen, $7.00 US, for your overnight, make your bus reservations for the next day, eat dinner and chill out, this way you can sleep about an hours longer the next morning. The first bus out is at 6:15AM, the next at 7:15 the trip to Chetumal takes 5 hours +/-. Bus or Taxi to border and Corozal, there is a 3:30 & 5:30 flight to SP/AC, stops on CC are by request.
[This message has been edited by Su_Amigo (edited 01-09-2002).]