Cancun: Oasis Beach All Incl.
7 nights w/ air (from BDL)
Cancun: Hyatt Regency
4 nights w/ air (from LAX)
Los Cabos: Puerto Bonita Retreat
6 nights w/ air (from DCA)
Puerto Vallarta: Buenaventura Hotel
7 nights w/ air (from PDX)
If the deals above look interesting, you might also enjoy these destinations.