Unions are threatening to bring Geneva Airport to a standstill next Thursday if the board votes to accept a new pay deal.
Unions say it will mean a cut to bonuses and a pay freeze.
Airlines have been warned the action may mean some flights will have to be diverted.
The action will impact security controls.
Unions say they expect workers will support a strike call as 300 attended a meeting to discuss action.
Emergency heatwave plans active
Parliament backs VAT hike for pension payments
Parliament rejects trade agreement
Sperm donation laws hit setback
AI hits travel agent
Migros upsets locals with wrong number
