Mesa Air Group, the parent of go! airlines, said today it's unionized pilots have ratified a new two-year labor agreement.

Details of the agreement, reached after nine months of negotiations between Mesa and the Air Line Pilots Association, were not released.

"We are delighted our pilots have ratified this new agreement," said Jonathan Ornstein, Mesa chairman and chief executive officer. "In supporting this contract our pilots have demonstrated their understanding of current industry conditions and have approved an agreement that both addresses their concerns and fully maintains Mesa's industry leading cost and productivity advantage."