Southwest and its sister airline AirTran have launched another airfare sale, with one-way tickets starting at $59. Usually such sales are for two or three days, but this time Southwest and AirTran are giving you more than one week to find a cheap airline seat — purchase by Aug. 24, 2012, 11:59 p.m. PT. for travel every day of the week except Sundays, between Aug. 24, 2012, and Feb. 13, 2013 (blackout dates apply). The discounted fares are available on the airline websites — click here for Southwest, click here for AirTran. On sale, a one-way fare between New York’s LaGuardia and Orlando is $114.