Spirit Airlines via ShermansTravel offers Spirit Airlines Roundtrip Flights to Mexico and the Caribbean from select cities in the U.S. with prices starting at $97.78. (On the ShermansTravel landing page, click on "Spirit.com" in the main paragraph to see this sale.) That's the lowest current rate for select routes by $53, although we saw it for $2 less last week (since expired). This price is valid on flights departing on November 7 from Fort Lauderdale, FL, (FLL) with arrival in San Juan, Puerto Rico, (SJU) and return on November 15. This sale also includes routes to St. Thomas, U.S.V.I. (STT). Book this travel deal by October 31 for flights through November 30.

All prices, dates, and booking details were valid at the time of publication.