JetBlue has agreed to buy Spirit Airlines for $3.8 billion in a deal that would create the nation's fifth largest airline if approved by U.S. regulators. The agreement Thursday comes a day after Spirit's attempt to merge with Frontier Airlines fell apart. The combined airline would have a fleet of 458 aircraft. The airlines will continue to operate independently until after the transaction closes. Tap the link in bio to read more. #jetblue #spirit #airlines #merger