I hope this merger brings back the non-stop SW flights back to Dulles. I've flown AT and while they are OK, they are not my airline of choice. I pretty much only fly SW and Jetblue and most recently stopped flying SW because there are no non-stops out of Dulles. If they come back, I would start using them again.
I believe this was the driving force in Southwest's purchase of AirTran - to finally get takeoff/landing slots at major airports where SWA has a minimal (or no) presence such as IAD/DCA, BOS, JFK, EWR, and ATL.
There are several smaller airports which will also see new service from SWA in the deal.
From my point of view, there are going to be a lot of winners in this deal -- I am hearing a lot of complaining on these boards that airfares to/from MCO will go up as a result of this merger. Do you have any proof on that? True, when "legacy" carriers like Northwest and Delta hook-up, it's going to eliminate one of the two and yes, prices will increase.
Southwest only has a few small mergers under their belt and none of those were with any large carriers. This hook-up with AirTran will be the first major merger in their history. They (SWA) have no choice but to do right by the flying public, as their reputation will soon be on the line (and despite the comments of a few on this board who obviously have the means to pay more to fly other carriers, Southwest has something of a love affair with their customers).
Don't believe me? Think back to PHL before 2004, when the only flying option, there was U.S. Airways (and the other major carriers with flights to their respective hubs). Prices were outrageous -- people (myself, included) were driving to BWI to save a couple hundred dollars.
Needless to say, things are different, now -- not perfect, but definitely better.
FWIW, the winners will be the customers -- particularly, in those airports I already mentioned.
And the losers? Obviously, ATL/Delta's "fortress" hub, who successfully kept SWA out for many years. Until now.