Finnair said on December 11 it was preparing to cancel some flights on December 12, after the Finnish Air Line Pilots’ Association (SLL) rejected a settlement proposal for a collective labor agreement, Report informs via Reuters.

SLL will start a standby ban on Finnair pilots on December 12, meaning pilots will not come to work from on-call shifts, Finnair said in a statement, adding that there was already an ongoing ban on overtime work.