Southwest Airlines has traditionally used a "point-to-point" business model rather than the "hub-and-spoke" model used by Delta or United. This means they fly directly between smaller cities, which allows for faster aircraft "turnaround times" (often under 25 minutes). They also famously used an "open seating" policy for over 50 years, though in 2025/2026 they began transitioning to assigned seating to increase revenue from premium seat sales. Another key difference is their fleet: Southwest almost exclusively flies the Boeing 737, which drastically reduces maintenance and training costs. While they have recently introduced baggage fees for some fares, they remain known for their "LUV" culture and high level of flexibility, such as no change fees. Their goal is to operate like a high-frequency "bus service" for the skies, prioritizing efficiency and high aircraft utilization over the multi-cabin luxury focus of legacy international carriers.