To reach Koli - you have multiple options:
1. Car - car ride from Helsinki is around 5hrs

2. Plane to Joensuu + Bus / Taxi to Koli

3. Train to Joensuu + Bus / Taxi to Koli

You can find your flights from https://www.finnair.com/fi-en

Train can be booked from https://www.vr.fi/en

Bus tickets from https://www.matkahuolto.fi/en

If you have any questions, please call or contact our sales team via email. We are more than happy to assist arranging your travels!