Umbrella union LO Stat warned it could pull 220 members of the Norwegian Civil Service Union and the Electricians and IT Workers Union at airports Bergen Flesland, Molde Årø, Kristiansund Kvernberget, Mosjøen Kjerstad, Mo i Rana Røssvold and Harstad/Narvik Evenes. Some employees at Oslo Gardermoen would also be affected.
Midnight May 15 is the deadline for a deal that affects most airport employee groups with the exception of air traffic controllers.
"The parties are not near an agreement and there is a real danger of conflict. We enter all negotiations with the ambition of reaching a result, but there is no doubt that this will be a challenge," said Lise Olsen, LO Stat's chief negotiator during mediation.
Overtime payment is one of the key topics in the settlement talks.
