articleFrontier Airlines announced 20 new routes on Tuesday from major metropolitan areas, with some fares as low as $29. The new domestic and international routes are launching from Houston, Detroit, Fort Lauderdale, Dallas, Charlotte and Baltimore later this year into early next year. Some of the ultra-low-cost flights are from Baltimore/Washington International Airport to George Bush Intercontinental Airport and George Bush Intercontinental Airport to Fort Lauderdale-Hollywood International Airport. Frontier Airlines may be looking to woo customers from Florida-based Spirit Airlines, which warned it may not make it through another year due to concerns over its ability to raise enough cash. Spirit Airlines, riddled with debt, filed for bankruptcy in November 2024 after failed merger attempts with JetBlue and Frontier airlines.