Update: this popular deal may have sold out. See more deals >

Both airlines have launched a substantial flight sale this week, with cheap fares on over 100 domestic routes. Round-trip prices are advertised from $130. These are the rules:

– You can fly now through February 12, 2014.

– Fly any day of the week except Friday and Sunday.

– 21-day advance purchase required.

– Sale fares are one-way only; round-trip purchase not required.

– No travel allowed November 26 – December 3 and December 19 – January 5.

– Book flights by 11:59pm PT August 15.

Read the full details of each sale on the AirTran and Southwest websites, or use our airfare comparison tool to find the lowest prices.

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