For an early morning flight in a busy season, how long in advance should I arrive at Tromsø Airport in Tromsø, Norway? In detail, on 21 December there's a 6:55 flight (to Gran Canaria). There are other flights at 5:30, 5:55, 6:00, 6:40 and 6:45 (all domestic), then mine at 6:55, then none until 8:15. The first airport bus arrives at 5:45 (timetable 2012-10-28 – 2013-03-12. According to my ticket, check-in closes 45 minutes prior to departure. I will have luggage to check. Is a 5:45 arrival on a busy day at Tromsø airport on time to catch a 6:55 flight?
So your flight is an international flight.
The airport is fairly small, with just 5-6 restaurants, has wifi and opens officially at 4.30am in the morning.
To make sure, I'd always check the advice of the airport's website itself. In this case, the official Tromsø Airport website says:
On that advice, I'd try and get there at least a bit earlier - but would consider risking it if it was me. But understand that if you are late and weren't there 90 min beforehand, the airline is not likely to be sympathetic :(