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

Domestic fares are valid for nonstop travel on Mondays through Thursdays, as well as Saturdays, from January 2 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.

Tickets must be booked by 11:59pm, December 28.

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:

Newark to Indianapolis $118 round-trip

Austin to Nashville $296 round-trip

Houston to Nashville $264 round-trip

Chicago to Nashville $262 round-trip

Chicago to Cincinnati $98 round-trip

Milwaukee to Nashville $114 round-trip

Minneapolis to Nashville $192 round-trip

St Louis to Nashville $170 round-trip

Boston to Milwaukee $220 round-trip

Boston to St Louis $342 round-trip

Cleveland to Milwaukee $98 round-trip

Charlotte to Houston $210 round-trip

Charlotte to Chicago $260 round-trip

Columbus to St Louis $224 round-trip

Washington DC to Houston $258 round-trip

Washington DC to Milwaukee $224 round-trip