AirTran Airways (Orlando and Atlanta) will expand operations at slot-controlled New York (LaGuardia) and Washington (Reagan National) on November 4.
Press release with full details:
finance.yahoo.com/news/AirTran-Airways-Announces-New-prnews-1958440914.html?x=0&.v=1
AirTran is not starting service between DCA and LGA, they are adding service at the two airports, but not between them. The press release says that the DCA slots are being used for MCO and ATL and the LGA slots are going to be used for IND and MCO.
Thank you Tony for the correction.
Bruce