Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Rovaniemi (84% of total searches to Northern Finland). The next most popular destinations are Saariselka (9%) and Kiruna (7%). Searches for hotels in Oulu (1%) are also popular.
KAYAK users have found double rooms in Northern Finland for as cheap as $94 (Ivalo) in the last 3 days. The average price is $184.