Finnair Plus members cannot access their accounts between March 25 – 29, 2021, due to system maintenance.
All Finnair Plus services, including logging into your account, will be inaccessible during this time.
You can access Finnair here.
Here’s the announcement from Finnair:
It is an excellent time to get conduct system maintenance when travel is depressed and all loyalty program-related activities. Not sure what Finnair is doing because having systems down for four nights is rather extensive.