Public transport in Oslo is very well organized.
The public system transport in Oslo and its suburbs is called the Ruter and it includes city buses, trams, regional buses, the metro, local train lines and ferries, but doesn’t include the Bigdøi ferry.
Tickets can be bought in Ruter ticket selling spots, but you can also download the RuterBillet app, which will ease the purchase process. The app allows you to buy all tickets with only showing the confirmation on your phone when needed. There are no night fares in Oslo, the ticket price is the same regardless of the time of day or night. If you plan on travelling by boat, you only pay an extra €2 for all zones of travel, whereas children and the elderly only pay an extra €1 only in zone 1.
The price depends on the zone you are travelling in, and there are four zones.
A ticket is valid for 60 minutes and the prices for adults are: