Ryanair says it's going to close two of its bases, putting jobs at risk.
And it says delayed deliveries of Boeing's troubled MAX jets are to blame.
The budget airline says it will only get ten of the planes next year, instead of an already revised total of 20.
It had originally expected to have 58.
But last month it warned it might not have any at all in time for the busy summer season.
Delays have mounted following the worldwide grounding of the type.
The MAX has been out of action since March following two fatal crashes.
Now Ryanair says it will have to close bases at Nuremberg in southern Germany, and at Stockholm Skavsta Airport.
As a result it's lopped one million off its forecast passenger numbers for the full year in 2021.
The Irish carrier says it's working with Boeing, unions and affected airports to minimise the impact of the closures.