Southwest Airlines, which doesn’t look a day over 35, is celebrating its 39th birthday this week with a 3-day sale, offering fares as low as $39 each way for travel between Sept. 8 and Nov. 17.

While most fares on the list are either $79 each way or $119 each way, here’s a sampling of a hadful of the $39/way fares they list on their site:
Baltimore to Boston
Baltimore to New York City
Boston to Philadelphia
Burbank to Las Vegas
Chicago to Nashville
Detroit to St. Louis
Las Vegas to L.A.
Las Vegas to San Francisco
L.A. to Tucson
Minneapolis to St. Louis
NYC to Raleigh/Durham
Oakland to San Diego
And a bunch of others

In order to take advantage of the discounts, you’ll need to book by 11:59pm PST on June 24 and travel between September 8 through November 17, 2010. And it looks like you can’t get the discounts if you plan to travel on a Friday or Sunday.

To see the complete list of fares by city, go to Southwest.com

Want more consumer news? Visit our parent organization, Consumer Reports, for the latest on scams, recalls, and other consumer issues.