Hamburg → Copenhagen (cross-border, Vogelfluglinie ferry)
Take the A1 north approximately 150 km to Puttgarden on Fehmarn island, then cross on the Scandlines ferry to Rødby in Denmark — the historic Vogelfluglinie route, around 45 minutes on the water. Continue on the E47 to Copenhagen. The same app and free RFID card keep working in Denmark, with a live price shown before every stop.
