Transportation
There are several options for you to get from the airport Arlanda to KTH. 1 - Taxi: It's possible to preorder cars f.ex. from Taxi Stockholm. The cost is around SEK 520 (Euro 60) from the airport to the city centre 2 - Bus: Rent a bus from Delfin Buss via internet. This alternative has the best price, should all of the participants arrive at the same time. You can choose invoice payment with this alternative. 3 - Train: Take the Arlanda Express train which goes from the airport directly to Stockholm Centralstation. The train costs SEK 260 (EUR 30) one-way, SEK 490 (EUR 55) with return; you can pay by credit card on the train, or at the airport either at a ticket-machine or at some helpdesk. The train is a good way to travel, if you want to avoid the rush hour. Timetable for Arlanda Express
Then, from the central station, take the subway ("Tunnelbana"), red line (no. 14) towards "Mörby Centrum". Get off the train at "Tekniska Högskolan", take station exit labelled "Kungliga Tekniska Högskolan (KTH)", or use these walking directions