Purchase from November 30 through December 3, 2020, 11:59 p.m. Central Time.
Continental U.S. travel valid January 5 through March 17, 2021. Travel Continental U.S. to/from Hawaii valid January 5 through April 8, 2021.
Travel to/from San Juan, Puerto Rico valid January 11 through March 4, 2021. International travel valid January 11 through March 4, 2021.
Travel from continental U.S. to Hawaii blacked out February 11-14, March 19-20, March 26-28, and April 1-3, 2021. Travel to continental U.S. from Hawaii blacked out February 19-21, March 27-28, and April 2-5, 2021.
Except as otherwise specified, continental U.S. travel is not valid on Fridays and Sundays. Travel to Ft. Myers/Naples, Ft. Lauderdale, Miami, West Palm Beach, Tampa, Orlando, Sarasota, Steamboat Springs/Hayden, CO, Montrose, CO, and Las Vegas and from Ft. Myers/Naples, Ft. Lauderdale, Miami, West Palm Beach, Tampa, Orlando, Sarasota, Montrose, CO, and Steamboat Springs/Hayden, CO to Las Vegas is valid only on Sundays through Wednesdays. Travel from Ft. Myers/Naples, Ft. Lauderdale, Miami, West Palm Beach, Tampa, Orlando, Sarasota, Steamboat Springs/Hayden, CO, and Montrose, CO, and Las Vegas and from Las Vegas to Ft. Myers/Naples, Ft. Lauderdale, Miami, West Palm Beach, Tampa, Orlando, Sarasota, Montrose, CO, and Steamboat Springs/Hayden, CO is valid only on Tuesdays through Fridays. Travel continental U.S. to/from Hawaii is valid Monday – Thursday. Travel to/from San Juan, Puerto Rico is valid Monday – Thursday. International travel is valid Monday – Thursday. Travel to Mexico is valid only on Sundays through Wednesdays. Travel from Mexico is valid only on Tuesdays through Fridays.
Fares valid on nonstop service where indicated; if not indicated, fares are valid on single connecting service.
Check your destination here.
Example: Los Angeles to Reno/Lake Tahoe round-trip


screenshot from Southwest.com on 11/30/2020