From the Arrival gate at Arlanda Terminal 5, first go to the information lounge and take a queue number from the machine “Information and Tickets”.
When your number is showed over the counter, go to that specific counter and buy an “SL Access Card” (costs 20 SEK) and “90 Days Student Ticket” (costs 1540 SEK). The card is charged with the ticket.
If they ask about your student ID, show the admission letter, if they are not convinced with that, then it is your bad luck, buy a “30 Days Ticket” with regular price (costs 790 SEK).
You can go to Stockholm city by many means of public transportation.
a. Arlanda Express: Take the train “Arlanda Express” (costs 260 SEK) which will take you to Stockholm Centralstation in 20 mins. Buy the ticket either from the Information Lounge or from the counter downstairs (follow the signs to get to the platform for Arlanda Express) or from the ticket machines.
b. SL Train: Take the regular trains (called Pendaltåg in Swedish) from Sky City in Arlanda C (costs 75 SEK even if you have the SL Access Card) which will take you to Stockholm Centralstation in 40 mins. Buy the ticket from the entrance of the train station marked as “SL Center” at Sky City in Arlanda C (follow the signs to get to the “SL Center” at Sky City in Arlanda C). Sky City is located between Arlanda Terminal 5 and Terminal 4.
c. Airport Bus: Take the airport bus called “Flygbussarna” or “Swebus” from terminal 5. Buy the ticket from the Information Lounge as described before. If your are 25 years old or less, then buy the “Child/Youth Ticket” (costs 79 SEK).
Swebus takes 35 minutes and Flygbussarna takes 45 minutes to reach Stockholm City from Arlanda Terminal 5.
This is the best option if you are coming alone or have lots of luggage.
d. With the SL Card: Go to the bus counter 15 (left of the arrival gate, just outside of the airport entrance) and take bus “583 mot Märsta Station”.
note: The word “MOT” means “Towards” and all transportation are named after the last station. “583 mot Märsta Station” means this bus 583 will go towards and up to Märsta Station.
Get off at Märsta Station and walk to the train station at Märsta.
The surface trains are called “Pendeltåg” in Sweden and Pendeltåg stations are marked with the letter “J”.
Take the train 36 mot Södertälje Centrum, (or Stockholm C or Alvsjö sometimes) and get off at Stockholm Centrationstation.
Again, remember, The train will go towards and up to Södertälje Centrum, but you need to get off at Stockholm Centrationstation.
This is the cheapest option so far, only convenient when you have less luggage or not alone.
How could you go to KTH?
Now if you want to go to KTH, you have to take the underground train/subway/metro whatever you call it. In Swedish, they are called “Tunnelbana” and marked with the letter “T”.
Note: Stockholm Centralstation is a big station which is also the central staion for “Tunnelbana”s as well. That is why it is also known as “T-Centralen“. So the station is has so many signs to help you find your direction. But usually “T-Centralen” refers to the central station for the Tunnelbana and “Stockholm Central” means the central station for the surface trains. If you come to the Stockholm Centralstation with bus, then it is know as “City Terminalen”.
But the reality is “Stockholm Central”, “T-Centralen” and “City Terminalen” all refers to Stockholm Centralstation, but different places of the station.
Now there are 3 different Tunnelbana lines names as Red line (Röda Linje), Blue line (Blå Linje) and Green line (Gröna Linje). There you will see signs as SPÅR 1, SPÅR 2 etc. The word “spår” means “track” in english. KTH is located at a tunnelbana station called “Tekniska Högskolan” on the red line towards Mörby Centrum from T-Centralen. See the Tunnelbana Map of Stockholm.
As you can see, you have to take the Tunnelbana coming on the red Line towards “Mörby Centrum”. Look at the signs and find out which Spår you need to go to and on which platform it is located.
Remember, you always need to present your SL access card when you enter the Tunnelbana station or the bus on the blue SL access card reader.
Go to that platform and take the train towards “Mörby Centrum” when it arrives.
Get off at “Tekniska Högskolan” station. Follow the signs and decide which exit you should take.
After getting out you should see the beautiful view of KTH – Royal Institute of Technology.