Oneworld carrier Finnair is prepared to stop paying its personnel if the widespread closure of European airspace persists for an extended period.
The airline estimates the closure is costing the airline €2 million ($2.7 million) per day.
It says that it has informed staff that "salary payments will stop" after two weeks if the situation prevents the airline from operating normally. Such action would halve the daily loss.
Since the disruption to air traffic, caused by a volcanic eruption in Iceland, started on 15 April Finnair has had to cancel 435 flights over a three-day period.