Frontier plans new flights from JFK to big American Airlines hubs Miami, Los Angeles and Dallas

Discount carrier Frontier Airlines is beefing up service in New York, planning new routes to major American Airlines hubs with fares starting under $20.The airline plans to launch service between New York's John F. Kennedy International Airport and Miami International Airport on March 30.A roundtrip flight leaving on April 1 and returning a week later was showing as$38 on Frontier's website for a basic ticket, which doesn't include a seat assignment or carry-on bag and is non-refundable. The same trip on t ...