The shutdown of Spirit Airlines has led to a notable increase in share prices for JetBlue Airways and Frontier Airlines, with JetBlue shares rising by 5% and Frontier shares by 4%. Spirit's exit from the market, attributed to its failure to secure a government bailout, opens up opportunities for both airlines to capture the leisure travel market previously dominated by Spirit. The airline had a significant presence in this sector, offering 4,119 domestic flights and 809,638 seats in a short span. With Spirit's departure, JetBlue and Frontier can expand their routes and potentially attract former Spirit customers. JetBlue is particularly focused on enhancing its operations from Fort Lauderdale-Hollywood International Airport, planning to add service to 11 new cities and increase daily departures by 75% compared to 2025. Analysts believe that the reduced competition could lead to improved pricing power for both airlines, allowing them to enhance profit margins. The ongoing changes in the US airline industry will be closely monitored as JetBlue and Frontier adapt to the new market landscape.