Southwest's 72-hour sale includes $49 one-way flights

DALLAS -- Are you ready to book your summer vacation?

On Tuesday, Southwest launched its bi-annual nationwide sale that includes one-way fares starting at $49. The three-day sale means you can book dozens of nonstop round-trip tickets for less than $100.

The sale only includes one-way "Wanna Get Away" fares. For longer flights, the pricing increases to $79, $99, or $129 for fares included in the sale.

While it's not advertised in the sale, we even found some one-way fares for as low as $44 (Boise to Spokane, Greenville (SC) to Atlanta, Memphis to Chicago, Memphis to Houston, Omaha to Chicago).

According to the fine print, you must book your flight by June 8 for travel between August 22 and December 13. There are some blackout dates around the holidays and is not valid on Fridays and Sundays.