Finnair Airline designs good for their pessengers. Bother and deferrals are not the part of the airline but rather sometimes it occurs and the airline makes up this by offering Finnair Cancelled Flight Compensation. Assuming that you don't wish to pay charges then your ticket should be of 7 days from the flight. In the event that the airline cancels your flight ticket then they give two choices to their pessengers. The initial one is to make a discount solicitation or the second one is to take another flight.

https://airlinespolicy.com/cancellation-policy/finnair-cancellation-policy/