The low-fare carrier has struggled to find its footing after its planned merger with JetBlue was blocked by a federal judge. Airlines and Airplanes, Mergers, Acquisitions and Divestitures, Bankruptcies, Prices (Fares, Fees and Rates), Spirit Airlines, JetBlue Airways Corporation, Stocks and Bonds, Indigo Partners LLC, Pratt & Whitney, Airbus Industrie The low-fare carrier has struggled to find its footing after its planned merger with JetBlue was blocked by a federal judge. NYT > Business