Citing problems with Pratt & Whitney powerplants for the Airbus A320neo twinjets that comprise the majority of its fleet, Spirit Airlines ceased operations at Denver International Airport (DEN) in 2024. Spirit had previously operated at Denver International Airport from 2002 to 2004, returning in 2012, making this the airline's second exit. With off-wing inspections that can take hundreds of days, this affects not only Spirit Airlines but also a large percentage of aircraft worldwide. Today, Spirit Airlines is undergoing a radical ‘shrink to profitability' strategy through its second Chapter 11 bankruptcy process. Related These Are The Most Affected US Airlines By Pratt & Whitney Engine Groundings Today Spirit Airlines faces the biggest impact.