The subways and most buses and trikken start running at 5:30 AM, with the last run after midnight. On weekends, there's night service on certain routes. Trips on all public transportation within Oslo cost NKr 30, with a one-hour free transfer; tickets that cross municipal boundaries have different rates. It often pays to buy a pass or multiple-travel card, which includes transfers. A day card (dagskort) costs NKr 55 and a seven-day pass costs NKr 190. Tickets can be used on subway, bus, or trikk.
A flexikort for NKr 150 is available at Narvesen newsstands, 7-Eleven stores, tourist information offices, T-bane stations, and on some routes; it is valid for eight trips by subway, bus, or trikk. The Oslo Card offers unlimited travel on all public transport in greater Oslo. A one-day Oslo Card costs NKr 190, a two-day card NKr 285, and a three-day card NKr 375. Children's cards cost NKr 75, NKr 95, and NKr 125 and a family card costs NKr 395. The cards can be purchased at tourist information offices and hotels. The Oslo Card also includes free admission to museums and sightseeing attractions; free parking in certain public spaces; a miniboat cruise; admission to public swimming pools; discounts on car, ski, and skate rentals; and discounts at specified restaurants and theaters.