The US Court of Appeals has thrown out a ruling in favour of American Airlines, in the carrier's suit to stop its passenger service agents and representatives from voting on union representation.
The appeals court for the fifth circuit said that the district court did not have "subject matter jurisdiction" in its reversal of the lower courts ruling, in a filing on 3 October.
Fort Worth-based American cited the fact that the Communications Workers of America (CWA) did not meet the requirement that 50% of the affected employees show interest in the election in the suit that it filed earlier this year. The US National Mediation Board was to hold the election from 21 June to 2 August.
Laura Einspainer, vice-president of employee relations at the airline, says that the ruling does not mean the election will go forward and that there are further legal steps it can take, in a letter to employees.
CWA "commends" the decision, in a statement.
The election would cover the nearly 10,000 passenger service agents and representatives that work at American.