STL and SAN are Air Tran's newst cities.

4 DAILY STL-ATL and 1 DAILY STL-MCO.

STL-ATL begins in may and STL-MCO begins in June.

SAN-ATL will also be offered.

http://www.stltoday.com/stltoday/news/s ... enDocument

However, SAN is only seasonal.