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 had pitched the bankrupt airline on a coupledom that it claimed would have created a formidable low-cost competitor in the battle for passengers against American Airlines, Delta, Southwest, and United. While Spirit said a merger could create a “potent competitor in the marketplace” they’re just not that into it.

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.