https://www.southwest.com/html/promotions/nationwide-sale-150908...

Hurry and grab a sale fare now for travel 9/223/3. This sale won't last longbetter book it! Book by September 24. Travel September 22, 2015 through March 3, 2016. Travel to/from San Juan, Puerto Rico valid September 22, 2015 through December 10, 2015 and January 19, 2016 through March 2, 2016.
14-day advance purchase required.Blackout dates apply: November 24 - 25; November 28 - December 1; December 26 - 28, 2015; January 2 - 3; February 11; February 15 - 16, 2016. Travel not valid on Fridays and Sundays. Travel to/from Florida or Nevada is valid only on Tuesdays & Wednesdays. Travel to/from San Juan, Puerto Rico is valid only Mondays through Thursdays. Restrictions and exclusions apply. Nonrefundable. Select markets. Seats and days limited.