72-hour sale: Southwest fares fall below $100 round-trip

72-hour sale: Southwest fares fall below $100 round-trip

Southwest’s big twice-a-year fare sale is back, with round-trip fares below $100 on dozens of the carrier’s shortest routes.

The sale fares also include longer routes, with the price of flights loosely tied to distance. Flights begin at $49 each way on Southwest’s shortest routes and increase to $79, $99 or $129 each way for longer flights.

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