Southwest and Airtran will give double Rapid Rewards and A+ Rewards credits for all travel between September 13th and November 15th. For Southwest, you must register here. For AirTran, you must register here.

Let the matching begin…(actually, I don’t think anyone will go near this. But we’ll find out soon enough.) It’s been a while since we’ve seen a broad everyone-gets-double-miles promo in quite some time (I can’t even remember when…probably since the crazy double elite miles virus that spread a couple of years ago).