Southwest converts AirTran operations in four cities: Charlotte, N.C.; Rochester, N.Y.; Flint, Mich.; and Portland, Maine Southwest expands footprint beyond the 48 contiguous states for the first time in the carrier’s history with service to San Juan, Puerto Rico 2013-04-15 — /travelprnews.com/ — Southwest Airlines (NYSE: LUV) launched inaugural service to five cities on Sunday, April… Read the full news article