Southwest Revives Nationwide Flight Sale With Fares From $39

Southwest Airlines has once again extended its nationwide sale featuring fares as low as $39 one-way and $78 roundtrip.

Travelers have from now until 11:59 p.m. CT on Thursday, March 26 to score the discounted fares.

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The extended sale is valid for continental U.S. travel between April 14 and June 6 and from August 18 through October 30; interisland Hawaii travel from April 14 through May 20; travel to/from San Juan, Puerto Rico between April 14 and May 14 and September 8 through October 30 and international travel from April 14 through May 14 and from August 18 through October 30.

The sale fares require a 21-day advance purchase and continental U.S. travel is blacked out for Memorial Day (May 21-22 and May 25) and Labor Day weekends (September 4 and September 7).

Until now, the best deals were typically only available on Southwest's interisland Hawaii service such as Honolulu to Kona.

However, customers can find $39 one-way fares on a handful of routes within the continental U.S. right now, including Atlanta to Fort Lauderdale or Nashville; Baltimore to Boston or Charlotte and Los Angeles to Las Vegas, among others.

Contact your travel advisor or visit Southwest.com to filter flight deals by your departure city.