Southwest is always having sales, yet they remain one of the few profitable airlines. Now why is this? Anyway, their latest sale for travel Jan 29-Feb 29 ends tonight midnight CT.
Fares range from $49 to $99 each way, no round-trip purchase required. Ft. Myers, FL; New Orleans, LA; and Orange County, CA are not included in this sale. What's particularly good about this sale is that it's not the usual Tue/Wed only deal. You can find seats seven days a week, with a few exceptions.
Be sure to use Southwest's "ShortCut" (their flexible date search calendar) to find seats more easily. Most other airlines are matching this sale.