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

Southwest has posted a big new fare sale this week. The airline is selling cheap seats on over 100 domestic routes, and the fares are good for travel right through the winter. Round-trip prices start at $118. These are the rules:

– You can fly November 23 through March 12.

– Travel blackouts apply on certain dates — details on the Southwest website.

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

– No Friday or Sunday flights.

– 10-day advance purchase required.

– Sale expires 11:59pm PT November 25.

Find the cheapest domestic airfares here

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