By plane
Rovaniemi Airport (http://www.finavia.fi/air...) RVN or EFRO, located eight kilometers north from the city center, is the largest airport in northern Finland. Most of the flights go south to Helsinki, but it fields a limited number of international flights mostly to North Russian destinations like Murmansk. To get to the city center you have to take a bus or a taxi. Flights from Helsinki, operated by Finnair or Blue1 or Norwegian, may be cheaper than corresponding train.
By train
Rovaniemi is the terminus of most trains from the south. The line extends only a little further northeast to Kemijärvi. The journey from Helsinki takes 9–12 hours and is reasonably comfortable in a sleeper. You can also take your car with you. The railway station is located right next to the city centre and is within an easy walking distance - you facing north when you exit the station, and the city center is to your right, to the northeast. Most of the long-distance buses stop here as well.
By bus
Gold Line (http://www.goldline.fi/) and Oy Matkahuolto Ab (http://www.matkahuolto.fi/en/) operate daily night buses to Rovaniemi from Helsinki via Helsinki-Vantaa Airport. Coming by bus from the south is relatively cheap but requires about 14 hours of sitting.
The bus station is in the city center and is just a few hundred meters away from the railway station.