Joele Frank represents Frontier Airlines and Sard Verbinnen & Co. handles Spirit Airlines as the “ultra-low” cost carriers combine to create the nation’s fifth largest airline with $6.6B revenues.

Frontier shareholders will own 51.5 percent of the merged airline and its chairman William Franke will lead a committee to select the management team, branding and headquarters city of the combined carrier.

Frontier/Spirit promise to expand service to underserved small- and mid-sized cities across the US and add 10K new employees by 2026.

Joele Frank, Wilkinson Brimmer Katcher’s Ed Trissel and Joseph Sala work the Frontier business, while Sard Verbinnen’s Andrew Cole, Robin Weinberg and Columbia Clancy handle Spirit.