Oslo
OSL Express
Airport coach with direct transport between Oslo east and Oslo Airport (OSL) at Gardermoen
The OSL Express bus makes more than 30 stops between Mortensrud and Furuset on its way to/from the airport.
Tickets are cheapest at oslekspressen.no, but you can also buy them on the bus (20–40 NOK extra) with cash or a credit card.
Source: VisitOSLO as
OSL Express