I went to Iceland at Christmas to see the Aurora Borealis. Reykjavik is the best serviced airport in the standard auroral zone (sure, you can see the aurora around Calgary/Banff around the equinox, a couple times a year the aurora come down to Toronto, once every dozen years the aurora will be visible from rural areas in the Texas panhandle), but Iceland is consistently one of the best places on the planet to view aurora. And even there it’s hit and miss. We were there for 4 nights. Night zero our airplane flew 200 miles north of the aurora. Night one Reykjavik, nothing. Night two Hveragerdi, nothing because clouds. Night three Höfn, we could see a glow on the Atlantic horizon (similar to a white night in summer, but not really impressive). Night four, when we had given up hope, when it was cloudy and snowing, the clouds broke and we were rewarded with a bright aurora show in downtown Reykjavik til almost 3am.

My Aurora Forecast is the best app for seeing the Northern Lights. https://northernlights.online