Choice Hotels, which has Caribbean properties in the Bahamas, Cayman Islands, Dominican Republic, Puerto Rico, Turks & Caicos, and Curacao, will award one free night's hotel stay for every two stays at Choice properties worldwide.

What's nice about this deal is that you can earn free stays at vacation destinations in the Caribbean while traveling in the U.S. or Canada for business or pleasure: the chain, which includes Comfort Inn, Comfort Suites, Quality Inn, Sleep Inn, Clarion and MainStay Suites, has more than 1,000 hotels in the U.S., Canada, and the Caribbean.

Credit toward free nights can be earned on all stays between Sept. 1 and Dec. 15. Stays are defined as one or more consecutive nights spent at a single property, regardless of duration. There are some caveats, so check the full program rules before you book a stay.

You also need to join the free Choice Privileges program to earn free nights; signup is available online.