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

Southwest has announced a wide-ranging domestic fare sale, cutting prices on routes all over the country. Advertised fares start at $122 round-trip.

These are the rules:

– You can fly September 2 through March 5.

– No Friday or Sunday flights (this varies on a few routes).

– 14-day advance purchase required.

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

– The offer is valid until 11:59pm August 28.

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