Spirit, which filed for bankruptcy protection last year, says it has rejected the new Frontier overture but would be open to a higher offer.

A temporary Ground Stop was issued for all destinations for Frontier Airlines on Thursday, according to the Federal Aviation Authority.

IT issues at Frontier Airlines triggered a brief ground stop at all of the U.S. budget carrier's destinations on Thursday evening, according to an advisory from the U.S. Federal Aviation Administration.

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.

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.

Frontier Airlines has made another bid for Spirit Airlines, but the offer failed to sway the South Florida-based ULCC as it proceeds through a Chapter 11 restructuring.

Frontier is making an offer to acquire the beleaguered Spirit Airlines, which filed for bankruptcy in November.

Denver-based Frontier Airlines says it’s ready to keep talking after bankrupt Spirit Airlines rejected its offer to merge.

The carrier filed plans with Denver that offer more clues for the future use of 113 acres it bought near the Peña Station Next development.

Frontier Airlines’ second attempt at acquiring rival Spirit Airlines could impact not only one but two western Pennsylvania airports although the bankrupt air carrier said it preferred to emerge from bankruptcy protection as a standalone carrier.

Frontier said a merger would be better for long-term viability, making the combination the fifth largest airline in the United States and producing at least $600 million in operational savings. It argued that the deal would offer greater value to Spirit’s stakeholders than the company’s current restructuring plan.