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

Southwest has just cut prices right across the board, offering special sale fares on over 50 domestic routes. Advertised prices start at $138 round-trip. These are the rules:

– Fly April 1 through through June 17.

– No travel on May 22, 23, and 26.

– No Friday or Sunday flights.

– 14-day advance purchase required.

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

– The offer is valid until 11:59pm local time on March 24, or while availability lasts.

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