Southwest Airline’s twice-a-year fare sale is back this week and if you have plans to travel later this year, you might want to take advantage of some of the cheapest prices of the $49 one way.  But hurry sale ends very soon.

Round-trip fares below $100 on flights out of Boise and on dozens of the carrier’s shortest routes around the U.S. You can also save on longer Southwest routes too.

Flights begin at $49 each way on some of Southwest’s shortest routes and increase to  $129 each way for longer flights. The sale began Tuesday (6/6) morning and is good for travel from August 22 through December 13...sorry you can't book your cheap Christmas fares.

Flights on Fridays and Sundays are excluded from the sale as are certain dates around the Labor Day and Thanksgiving holidays.

But you better hurry because Southwest’s sale only lasts till this Thursday (6/8) at 11:59 p.m.