The latest sale from Southwest includes both domestic and international routes for nonstop travel through spring 2018.

Fares are valid for nonstop travel on Mondays through Thursdays, as well as Saturdays, from December 19 through May 23. Fares to/from San Juan, Puerto Rico are valid from January 16 through March 1, and again from April 3 through May 17. International fares are valid for travel from January 9 through March 1, and again from April 3 through May 18.

Avoid black out dates from December 22-23, December 26-27, and December 30.

Tickets must be booked by 11:59pm, December 7.

Please note, these fares are only available on Southwest.com. Other carriers regularly match these sale fares, so be sure to compare to find the best deal.

Fares include:

Washington DC to Orlando $196 round-trip

Indianapolis to Orlando $194 round-trip

New York to Atlanta $196 round-trip

Philadelphia to Fort Lauderdale $186 round-trip

Philadelphia to West Palm Beach $186 round-trip

Philadelphia to Tampa $186 round-trip

Philadelphia to Las Vegas $388 round-trip

Pittsburgh to Fort Myers $256 round-trip

Atlanta to Denver $236 round-trip

Detroit to Las Vegas $304 round-trip

Indianapolis to Phoenix $302 round-trip

Minneapolis to Denver $174 round-trip

Oklahoma City to Las Vegas $234 round-trip

Omaha to Phoenix $256 round-trip

San Antonio to Las Vegas $230 round-trip

St Louis to Las Vegas $250 round-trip

Denver to Las Vegas $166 round-trip

Phoenix to Las Vegas $130 round-trip