Hotwire.com offers a Celebrity Cruiselines 4 Night Cruise for two to Cozumel for $199 per person. Coupled with a $50 onboard credit, this is the best deal we could find on similar excursions. Click the link above, then click cruises from the tabs on top. Then select Caribbean from the first drop down, and Celebrity from the second drop down. Then click search cruises, and the first cruise is the one you're looking for. The ship departs Miami, with stops in Keywest and Cozumel. Trip begins on 10/4 or 10/27.