Spirit Airlines, originally founded in 1983 and rebranded in 1992, adopted an ultra-low-cost carrier model that made it the most profitable U.S. airline by 2015. However, the company's long-term strategy was undermined by three critical mistakes: competing solely on price, delivering a poor customer experience, and failing to adapt to changing market demands. By relying almost entirely on low fares and ancillary fees - accounting for over 43% of revenue by 2015 - Spirit alienated customers with cramped conditions and aggressive fee structures, resulting in the highest passenger complaint rate in 2015. When the pandemic hit, the airline was already vulnerable, and its inability to retain customer loyalty left it exposed.
The airline's financial troubles were exacerbated by aggressive expansion and high debt, which grew from $2.2 billion in 2019 to over $3.3 billion by 2023. Despite record revenues post-pandemic, rising operational costs and failed merger attempts with Frontier and JetBlue deepened its instability. A doubling of fuel prices due to the war in Iran in 2026 delivered the final blow, leading to Spirit's abrupt shutdown on May 2, 2026. The collapse underscored broader business lessons: competing purely on price is unsustainable, customer experience drives long-term loyalty, and companies must build resilient models that can withstand crises. The airline's failure highlights the dangers of over-leveraging, complacency, and failing to evolve beyond initial success formulas.