The company said it plans to offer carbon offset and biofuel purchases to customers as they buy flight tickets.
The six-month term's climate theme was reinforced by carbon offsets and no-frills arrangements.
Last year the Helsinki police department requested an investigation into the Compensate carbon offset foundation.
The carbon offsetting scheme may be in breach of Finland’s strict fundraising laws.
Few travellers pay for carbon offsets, but many say they aim to lower the burden on holiday destinations.