Originally Posted by finnair.com

MINIMUM CONNECTING TIMES at Helsinki-Vantaa Airport between Finnair, Finncomm Airlines and code-share partner airlines:

From one domestic flight to another 20 min
From a domestic flight to an international flight 30 min
From one international flight to another 35 min
From an international flight to a domestic flight 40 min
To and from Leisure flights 75 min

The minimum connecting times vary between other airlines and at other destinations.