Daily flights between Helsinki and Ivalo operated by Finnair and Norwegian. The transfer of groups of 1-4 persons from the airport to Nellim takes about 50 minutes and costs 85 euros (one way). We can arrange on request transport services between the airport and Nellim. In our Ready made activity-packages airport transfers are included. 
From Rovaniemi there is a bus or train connection with the terminal in Ivalo, from there you can take a taxi to get to Nellim, because there is no public transportations to Nellim. You can check buss schedule from http://www.matkahuolto.fi/en/ and trains from http://www.vr.fi/en/index.html.