Purchase from June 14 through June 16, 2022, 11:59 p.m. Central Time.
Continental U.S. and interisland Hawaii travel valid July 12 through August 31, 2022.
Except as otherwise specified, continental U.S. and interisland Hawaii travel is valid only on Tuesdays and Wednesdays.
Fares valid on nonstop service where indicated; if not indicated, fares are valid on single connecting service.
Check your destination HERE.
Example from Atlanta:

Screenshot from Southwest.com made on Jun 14, 2022