Helsingør
From Hitchwiki
Helsingør (in English also known as Elsinore) is a town in northern Denmark.Hitchhiking out
West towards Helsingborg, Sweden
Just go to the ferry terminal and ask the cars lined up to go on the ferry. There's a ferry every 20 Minutes. The ticket for one car always includes 9 passengers.
South towards Copenhagen
It's probably possible to stand at the place where the cars leave the ferry, if you didn't already find somebody in Helsingborg or on the ferry.