SWA may buy Airtran in the future and it would make sense, but Alaska is trying its best to make a case for SWA to buy them instead.
Alaska probably believes it is Shark bait and will be bought in the future. I think they are making a strong case for that certain purchaser to be SWA.
They are rapidly moving to an all 737 fleet. They are active in RNP conversion alongside SWA. They are using the same vendor for wireless, etc.
Looks like Alaska doesn't want to be left out of the dance, and they are hoping to be courted by SWA if you ask me.
AirTran on the other hand is doing eveything but marketing themselves. They may find out that is a bad move. When Frontier is gone in Denver and SWA and Alaska merge, AirTran will probably be the next target, but not likely for a merger. SWA will probably go for the jugular and move into ATL in a big way. but stranger things have happened.
Maybe SWA will buy them both.