Frontier Airlines is attempting for a second time to merge with the now bankrupt Spirit Airlines, which declared bankruptcy late last year as budget airlines struggle.Frontier Group Holdings Inc., the parent company of Frontier Airlines,

Budget carrier Frontier Airlines announced on Wednesday that it has made another bid for fellow discount carrier Spirit Airlines, which is in bankruptcy, for an undisclosed sum.

Spirit Airlines has rejected yet another takeover bid by discount carrier Frontier Airlines of Denver, saying its debtholders rejected the idea.