Ending today, Southwest Airlines offers select 1-way fares to Mexico and the Caribbean with prices starting at $98.60. (Click on "Southwest Airlines" in the top line to see this sale.) That's tied with our mention from last week and the lowest rate we could find for select fights by $45. This price is valid on flights departing from Baltimore, WA, (BWI) with arrival in Nassau, Bahamas, (NAS) on November 26. Book this travel deal today for travel through March 6, 2015. Other notable fares: All prices, dates, and booking details were valid at the time of publication.