JetBlue, Spirit Airlines call off $3.8 bln merger on antitrust hurdle
March 4 (Reuters) - Low-cost air carriers JetBlue Airways (JBLU.O), opens new tab and Spirit Airlines (SAVE.N), opens new tab canceled their $3.8-billion merger agreement on Monday, seeing no path forward after a U.S. judge blocked the deal in January on anti-competition concerns....