Spirit Airlines, a low-cost carrier, has declared bankruptcy for the second time in less than one year, highlighting the ongoing challenges the airline is facing. On August 29, the company announced their decision to file for Chapter 11 bankruptcy protection, citing financial pressures from decreased domestic demand, aggressive expansion in the past, and increased competition in key markets.

This filing comes after a tumultuous year for Spirit, during which they reduced their network capacity, restructured their operations, and attempted to stabilize their finances under a previous bankruptcy process. However, despite these efforts, a combination of slowing leisure travel demand and overexpansion in recent years has left the airline unable to recover.

The rapid growth of Spirit has been a major factor in their current difficulties. From 2000 to 2014, the airline’s average annual growth rate was 11%, which increased to 18% between 2014 and 2019. Even during the pandemic, Spirit pursued aggressive expansion, planning to increase their capacity by 20% by 2024. However, this growth was based on the expectation of post-pandemic “revenge travel,” which has since diminished.

With more than 85% of their capacity focused on the U. S. domestic market, Spirit has been particularly vulnerable to the slowdown in leisure travel. Their reliance on East Coast and Florida routes, which were once their foundation, has weakened their position as competition has intensified from other carriers like JetBlue and Southwest. In 2016, Spirit’s share of key Florida–New York routes declined significantly before partially recovering later in the decade.

Another factor contributing to the airline’s struggles is their fragmented network strategy. Instead of focusing on depth, Spirit prioritized network breadth, resulting in a less efficient operation. By 2024, the airline served 430 airport pairs, compared to just 61 in 2010. However, more than half of their routes operated less than daily, limiting their schedule competitiveness and leaving them vulnerable to competitors with higher frequency services. Additionally, nearly 75% of their markets handled fewer than 150,000 seats annually, creating a fragmented operation for a low-cost model that relies on scale.

Currently, Spirit operates from 14 airports with more than 1 million seats each year, while their rival Frontier Airlines only has 9 bases with a similar total capacity. The overlap in Orlando and Las Vegas has intensified competition, with Spirit adding 150% more capacity in Las Vegas between 2020 and 2023 before scaling back in 2025. However, with visitor numbers to Las Vegas down 7% year-on-year in mid-2025, Spirit’s exposure in that market has become a liability.

The broader U. S. airline market is also having an impact on Spirit. Domestic leisure demand has decreased, and other low-cost carriers like Frontier are expanding aggressively. In 2026, Frontier plans to add 32 aircraft, while Spirit only has three in their plans.