Southwest Airlines: One-Way Fares from $59

Fares do not include federal excise tax of $3.80 per flight segment. A flight segment is defined as a takeoff and a landing.
Fares do not include airport-assessed passenger facility charges (PFC) of up to $9 and government-imposed September 11th Security Fee of up to $5 one-way.
10-day advance purchase required.
Purchase from January 3 through January 5, 2012, 11:59 pm Pacific Time.
Travel January 13 through May 16, 2012.
Travel valid only on Tuesdays & Wednesdays.
Travel to/from Phoenix, Las Vegas, and Florida not available on February 21. Travel to/from New Orleans not available February 21-22.