Southwest Airlines focuses on providing low-cost air travel to midsize cities. It enters competitive arenas like business travelers, leisure travelers, and students seeking low fares. Southwest uses vehicles like acquisitions and website development to standardize its low-price, reliable service. Its strategy of fast turnarounds through standardized operations and high aircraft utilization allows it to save over $750 million annually in interest costs, representing over 100% of its annual net income. However, threats remain to the long-term sustainability of this strategy.