Frontier digs at Southwest with its own free bag check promotion: ‘Divorce your old airline'

Frontier Airlines on Tuesday unveiled a free bag check promotion in a dig at Southwest, exactly one week after the rival budget carrier ended its own decades-old policy.The rival budget airline announced a new promotion bundling a seat assignment, free carry-on bag and free flight changes for customers who book Tuesday through March 24 for flights through Aug. 18.Frontier is also throwing in a free checked bag for flights departing May 28 through Aug. 18. 3 Frontier Airlines is launching a free bag check ...