Today only, Southwest Airlines cuts $10 off any roundtrip Wanna Get Away Fare via coupon code "FB2012". That's the best general-use discount we've seen for this airline since November. (We've seen greater discounts, but they've had minimum purchase requirements or required a vacation package.) The coupon code is good towards travel from February 21 through March 15. Blackout dates, additional taxes, and fees apply. A 7-day advance purchase is required.