Ther are 2 ways to get to Rovaniemi: seasonal direct flights by Finnair, Norwegian and EasyJey from UK, Turkey, Israel, Luxembourg; connecting flight via Helsinki.
If you travel to Rovaniemi with stopover in Helsinki, do not miss the opportunity to visit Helsinki between flights. Helsinki-Vantaa airport is located 20 kilometres from the centre of Helsinki and has convenient transport connection with the city from 5€.