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Cozumel, air/4 nights, from $459

Stay on this island off Mexico's Caribbean coast, near some terrific spots for scuba diving.

The Real Deal: Round-trip airfare on Continental, four nights' accommodations at , round-trip airport transfers, fuel surcharges, and hotel taxes and service charges, from $459 per person — plus about $110 in airport taxes.

When: Sept. 1–Oct. 28, Nov. 3–24, Dec. 3–20, 2010.

Gateways: Chicago, Houston; add $100 for L.A., Seattle; additional gateways available.

The fine print: Does not include about $110 per person in airport taxes. Based on double occupancy; single supplement is $149. Prices and travel dates are dependent upon flight availability and may vary; taxes and fuel surcharges are subject to change. Read before you book any Real Deal.

Book by: Dec. 15, 2010.

Contact: Caradonna Dive Adventures, 800/328-2288, .

Why it's a deal: In a recent Kayak search, we found a round-trip fare between Houston and Cozumel for $537, including all taxes, for travel in early September (multiple airlines). costs $569, including all taxes—just $32 more—for the airfare, plus four nights' accommodations and airport transfers.

More Add nights from $38 per person per night, based on double occupancy, or $75 per person per night based, on single occupancy. Add three meals daily and unlimited beverages for $39 per person per night.