Frontier Airlines is doubling in size

SEATTLE (CNNMoney) — Ultra-low cost carrier Frontier Airlines is doubling in size. The expansion, announced Tuesday, will add 21 new cities and 85 new routes to the airline’s network. By the summer of 2018, Frontier will operate 314 non-stop flights. That’s double what it flies today. “These new flights will allow us to serve even more of America and make flying a truly affordable option,” said chief executive Barry Biffle in a statement. Sunny locales like Tampa, M