Southwest Airlines SWOT: Financial strength is mainstay, but cost and culture challenges loom large

At 43 years of age, Southwest Airlines is firmly entrenched in middle age within a mature US market place. During its more than four decades the airline has largely retained its appeal and perpetuated its renegade image, even if that perception is now more legend than reality.

As its merger integration with AirTran comes to a close, Southwest continues to exploit its domestic strength by forging a presence in key US markets while laying the groundwork to bolster its international offerings in 2015 with service from a new international terminal at its sixth largest base measured by seats deployed, Houston Hobby.

But even as it still engenders positive customer sentiment, Southwest faces numerous challenges. These include preserving its culture and finding new ways to generate revenue. At the same time it is becoming more difficult for Southwest to brandish its low fare image with the rise of ultra low-cost airlines that are fulfilling Southwest's traditional role - traffic stimulation through rock bottom fares.