Arlanda airport is an international airport near Stockholm. There you can get from many european countries. From Finland you can travel to Stockholm by ferry.
The subway net is relly clear and easy to use. Ticket costs 20 SEK. Also the buses and trams are really easy transports and cheap. And it is easy to find the right one! Maybe the best way is after all to walk, because then you get to see more of the beautiful city.
To get to Stockholm from abroad you can take a plane to Arlanda airport and from there you can take either bus or train in to Stockholm.
While your in Stockholm the best way to get around is either walking or taking the subway. There are also lots of cabs here.
We arrived in Stockholm by the Arlanda airport, but a lot of people arrive in Stockholm by ferry.
You can get around by feet or you can also use the nice ferrys which are not that expensive!