Yes, if not going to the Helsinki city center, Jumbo shopping center & Flamingo Spa (connected) are good choices to kill time between flights:

http://www.jumbo.fi/from_airport_to_jumbo
http://www.flamingospa.fi/index.php/...mingo-spa.html

Of course there's the Via Spa in the non-Schengen terminal (45e):
http://media.finnair.com/spa/site/