Southwest Airlines has announced a 72-hour sale, with roundtrip airfares as low as $170 for their nearly 1,700 US city pairs.

These fares include taxes and service charges and are applicable for travel Monday through Saturday, Sept. 21 through Feb. 13, 2013. That is rare deal.

A few blackout dates apply, including dates around Thanksgiving and Christmas.  To get the great fares, purchase tickets at least 10 days in advance and no later than 11:59 p.m., Pacific Time on Sept. 13, 2012. Tickets  are nonrefundable once purchased.

A few examples of fares for this sale include:

  • San Diego to Tucson – $170
  • Atlanta to St. Louis – $300
  • Detroit to Nashville – $196
  • Milwaukee to New York City – $220
  • Kansas City to Las Vegas – $228

For a complete list of cities offered in this sale and to take advantage of this deal, visit the Southwest Airlines Web site.

Hot! 72-Hour Southwest Airlines Sale: Prices from $170 Roundtrip