Robert Nickelsberg/Getty Images(WASHINGTON) Spirit Airlines shareholders approved a takeover of JetBlue Airways on Wednesday, a merger that could create the fifth largest carrier in the U.S. "This is an important step forward on our path to closing a combination that will create the most compelling national low-fare challenger to the dominant U.S. carriers," Ted Christie, president and CEO of Spirit Airlines, said in a press release. "We look forward to continuing our ongoing discussions with regulators as we work toward completing the transaction and delivering value to Team Members, Guests and stockholders." While the $3.8 billion deal still faces regulatory approval, some experts say it could mean higher ticket prices for customers. A review from the federal government could take months if not years. "I think it's bad news for travelers," Scott Keyes, founder of Scott's Cheap Flights, said in an interview with ABC News. "Competition bet