Southwest To Double Philadelphia Flights >LUV = = Copyright =A9 2004, Dow Jones Newswires = NEW YORK (Dow Jones)--Southwest Airlines Co. (LUV) confirmed it will doub= le the number flights it plans to run to and from Philadelphia starting t= his summer. = The low-cost carrier also said it will add five roundtrip flights from La= s Vegas on June 13. = In a press release Thursday, Southwest said that, on top of the 14 daily = Philadelphia departures it plans for May 9, it will add 14 more on July 6= =2E = The move, first described earlier this morning in another Dow Jones repor= t, puts additional pressure on US Airways Group Inc. (UAIR), which has st= ruggled in competition with Southwest in Baltimore and on the West Coast.= = = Roger EWROPS