That is all great info, thank you all who replied. I did find good tickets to Tromso on Lufthansa but the layover is only 1 hr 50 min in Frankfurt. Anyone who's been there before think we'll make that connection in today's European airport situation? It's all on one ticket from USA but we'd have to go through passport control...
Only other choice is 2:10 in AMS to Trondheim.
I'm good with either destination, just want my best chance of getting on that connecting flight. Or I can pay $325 more for a 5 hour layover in AMS to Trondheim. Opinions?