The battle for Spirit Airlines (SAVE) took another turn over the weekend, as Frontier Group (ULCC) wrote to Spirit Airlines asking for the discount carrier for more time before a critical shareholder vote.
The proposed merger is the latest for an industry that has been consolidating since it was deregulated by Congress and President Carter in 1978. Ticket prices and flight routes that were once dictated by the government were now left to the airlines and markets to sort out. Fierce…