Someone will benefit from this sale. Just not sure who. (Let me know if it hits the sweet spot for you!)

Nonetheless, when Southwest offers a 50 percent discount on flights, you kinda take notice. But then you see it's only for travel on four, very specific - and very unlikely - days.

But, if you've got some downtime in the middle of the week at the end of January, this sale is for you!

Passengers can save half off Southwest flights when they travel between Jan, 24 and Jan. 25 or between Jan, 31 and Feb. 1. You must book your ticket today! And you can't use Rapid Rewards points toward the purchase.

And to make it really special, the discount may not be available in some markets, but it looks like those exclusions do not apply to BWI at all. But please check the fine print.

And use promo code HALFOFFDEC.