JetBlue combining with Spirit would make airfare more expensive, US says in lawsuit filed to block a merger

• The Department of Justice filed an antitrust lawsuit against JetBlue Airways on Tuesday.
• The lawsuit seeks to block JetBlue's acquisition of Spirit Airlines.
• Passengers will pay more if the airlines are allowed to combine, the DOJ said in its suit.

If JetBlue is allowed to buy Spirit Airlines, passengers will end up paying more in airfare across the board, the US Department of Justice argues in a new lawsuit it filed Tuesday to block the merger.