Since the merge between Southwest and AirTran was completed, both airlines have teamed up in order to have the best sales on the market.
To get the best fares you have to purchase by October 20 and travel on November 30 through December 14 and January 4 through February 15.
Southwest requires a 14 day advanced buy and blacks out Sundays. You must have in mind that these discounts don’t apply for holidays. Southwest already had a holiday sale earlier this month.
The fact that these two airlines teamed up on sales may begin competition on selected routes.
JetBlue has just offered a two-day sale for travel between October 25 and December 15. These sale fares are valid until October 18 at midnight and has black out dates of November 18-28, and also every Friday and Sundays.