Southwest Airlines [NYSE: LUV] may alone be the nation's sixth largest airline, nevertheless it doesn't act like No. 6 In many ways, it may be No. 1
The grandfather of the low-cost airline has appoint the pace and provided the original for the latest crop of low-fare carriers. In head- to-head matchups, it has bring United Airlines [OTC: UALAQ] and US Airways [Nasdaq: UAIR] onward the defensive. And, American Airlines [NYSE: AMR],
