Silver Airways via ShermansTravel offers Silver Airways 1-Way Flights to Key West, FL, from select cities in the U.S., with prices starting from $68.98. (On the Shermans Travel landing page, click on "SilverAirways.com" in the main paragraph to see this sale; we found this price departing from Fort Lauderdale, FL, on September 10.) That's the lowest price we could find for select routes by at least $81. Book this travel deal by August 31. All prices, dates, and booking details were valid at the time of publication.