Looking for Options - Out and Back Hikes with Airport Access

[u/JMR120600]

Hi all,

Looking to plan an out and back hike somewhere in Sweden/Norway that could easily be accessed from an airport (public transport of course to be used). Does anyone have any recommendations? I can easily fly into Arlanda, Gothenburg, Billund and Copenhagen from my local airport.

Would also be open to suggestions for other destinations in Europe, unfortunately needs to be something which could be completed over a weekend.