When one imagines a low-cost airline in the United States, Spirit Airlines will almost always come directly to mind. Famed for its yellow planes, famously poor service quality and for being the butt of many late-night jokes, Spirit Airlines was one of the first US-based carriers to truly delve in with the ultra-low-cost flight model. The carrier, which today is headquartered in Dania Beach, Florida, in the Miami metropolitan area, operates an extensive scheduled route network of flights throughout the United States, the Caribbean, and Latin America.