Yes, Spirit Airlines is categorized as an Ultra Low-Cost Carrier (ULCC), a tier even more budget-focused than "Standard" low-cost carriers like Southwest. In 2026, Spirit’s business model remains centered on "unbundled" pricing, where the base fare is extremely low, but every additional service—including carry-on bags, seat selection, and even water on board—incurs a fee. Following its successful emergence from financial restructuring in early 2025, Spirit has slightly modernized its model to offer "Premium" bundles, but its core identity is still the "Bare Fare." In the 2026 market, Spirit has had to compete with "Basic Economy" offerings from legacy carriers like Delta and United, which have flooded the market with low-fare seats. Despite its financial challenges in 2024-2025, Spirit remains the largest ULCC in North America, serving as a critical option for price-sensitive travelers who are willing to trade traditional amenities for the lowest possible ticket price.