Let down by the end of Southwest's free checked luggage move? Frontier is hoping to entice you onto their planes with a new limited-time deal.

Denver-based Frontier Airlines is taking a jab at Southwest Airlines and trying to lure in passengers with its new promotion.

Frontier Airlines is making a pitch to steal Southwest Airlines customers by asking them to “divorce your old airline” with a promotion for free bags and low ticket prices. In the latest volley in a brewing battle between low-cost air carriers with prominent Las Vegas operations,