Take commuter number 36 or 38 and get off at Solna station. The travel time is 7 minutes from Stockholm City and 4 minutes from Stockholm Odenplan. Take the north exit from the train station and the Arena is a 10-minute walk.
After an event you get to Solna station via Evenemangsgatan, or across Signalbron bridge, via Kolonnvägen on the other side of the railway. If you are heading north walk to commuter train station Ulriksdal via Signalbron bridge (at Quality Hotel Friends) and Kolonnvägen.
For big events, transport provider SL puts on extra trains for before and after the event.
Plan your trip with the SL Travel Planner