United Airlines pilots are to stage pickets in ten US cities on May 12 to protest contracts they claim are "nowhere near industry-leading standards".
The pilots said they would be "asking management to help complete a contract with modernised work rules" that would in turn "attract the best pilots in the industry".
The Air Line Pilots Association, Int’l (ALPA) said United had been making "four years of empty promises" and failed to recognise "the value pilots bring to the overall success of the airline".
"We want United to succeed as industry leaders, and every day that passes without an agreement, is another day the best and brightest future aviators go elsewhere," said Capt. Garth Thompson, United ALPA Master Executive Council chair.