Executives at Northwest Airlines and Delta Air Lines had hoped to get at least the Northwest pilots on board before announcing their merger.
Instead, they wound up 0-3 with Northwest's three large unions.
The pilots, ground workers and flight attendants are all opposing the merger, and for the latter two groups, their survival as union members may be at stake. At Delta, the ground workers and flight attendants are nonunion, and they outnumber their counterparts at Northwest.
The deal to create the world's largest airline was announced late Monday. The unions can't block the merger if it is approved later this year by the U.S. Justice Department, but they said Tuesday the deal cannot achieve its promise without their cooperation.
"Airline employees are right to ask if this is a recipe for failure on a grand scale," Stephen Gordon, president of District 143 of the International Association of Machinists (IAM), wrote to the union's members. IAM members, Gordon said, will be "taking action in the halls of Congress, visiting politicians in their home states and participating in rallies nationwide."
Leaders of Northwest's Air Line Pilots Association (ALPA) also reiterated their opposition to the merger on the basis of Delta's new contract with its pilots and failure to integrate the two pilot groups in terms of seniority, which affects pay and flight schedules.
"The labor discord which will result from the current structure of the merger is likely to overwhelm the potential economic positives," said Dave Stevens, chairman of ALPA's Northwest group. "They cannot be successful without the support of all employees."
Until they get a new contract, Stevens said Northwest pilots would follow the letter of their contract -- the so-called scope provisions -- which can affect the airline's ability to incorporate flexibility in its flight scheduling. That could make it more likely that Northwest could run into troubles with delays or cancellations during the summer travel season if the airline doesn't have a sufficient number of pilots ready to fly.