Southwest Airlines: Often provides nonstop service between San Antonio International Airport (SAT) and Orlando International Airport (MCO) with a competitive schedule, two free checked bags, and flexible rebooking — a strong choice for families and value-conscious travelers in September. Spirit & Frontier: Ultra-low-cost carriers may offer the cheapest base fares for SAT to MCO in September but charge add-on fees for carry-ons, checked bags, and seat assignments; ideal if you travel light and want the lowest ticket price. American & Delta (connecting): Legacy carriers commonly route passengers through hubs like DFW, CLT, or ATL, offering more premium services and loyalty-program benefits but usually at higher cost or longer travel time. For September travel, weigh baggage needs, change fees, and nonstop availability. CTA: Compare total trip costs (fare + bags) rather than base fare alone when booking SAT to MCO flights in September.