The cheapest way in. The Arlanda Express is 20 minutes quicker for SEK 140 more, which is not worth it at this party size.
Commuter train
40 · SLPickup, hours & luggage
Boards at. Arlanda Central, beneath Sky City
SL sells the SEK 43 fare and SEK 157 passage fee as one SEK 200 ticket. A reduced ticket is SEK 183, since the fee itself carries no concession. Under-18s pay no fee at all and travel for the reduced SEK 26.
Luggage. A commuter train, with space by the doors.
Hours. The commuter train stops at 00:44 and restarts at 04:44. In that gap SL runs night buses, which cost the ordinary SEK 43 and do not touch the station gates.