The cheapest Southwest Airlines fares are based on travel Tuesday and/or Wednesday. These low one-way fares between over 60 destinations within the U.S. range in price from $49-$109. Travel on other days of the week are little bit higher.

Fares can only be booked on www.southwest.com for travel between Dec. 11, 2007-Mar. 7, 2008. Your ticket purchase must be made no later than Dec. 17, 2007.

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