In general, when booking your flight to Tromsø, March is the cheapest month on average.
From most locations, booking your flights to Tromsø around 58 days prior to your departure date finds the best deals.
From most locations, the cheapest day to fly to Tromsø is Monday. Most users found that departing on a Sunday was most expensive.
On average you can find the best deals on plane tickets to Tromsø when looking for flights with morning departure times.