Stockholm Arlanda Airport

In the late 1950s it became obvious that Stockholm Bromma Airport was too small to serve international flight traffic to Stockholm, so a new airport was constructed and Arlanda was inaugurated in 1962. The name is derived from "Arland", an old name for the parish "Ärlinghundra" where the airport is, and also makes as a pun on the Swedish verb "landa" (landing). It is in the small town of Sigtuna, about half-way between Stockholm, by far the largest city in Sweden, and Uppsala, the fourth largest city in the country.
The airport has four terminals called Terminals 2, 3, 4 and 5. One of the main shopping and cafe areas, "SkyCity", is outside of the transit and security zones, between Terminals 4 & 5.

Arlanda is the busiest airport in Sweden and the third largest in the Nordic countries, serving some 25 million passengers in 2016.
Terminals 2 and 5 serve international flights and Terminals 3 and 4 serve domestic ones. All terminals have self-service check-in and baggage drop. Check-in automats can also be found at Stockholm central station, by the Arlanda Express trains, and at Cityterminalen in downtown Stockholm. Of course, all terminals also have staffed check-in desks.

Rail

Arlanda Central Station is located in "Sky City" between terminals 4 & 5.
The fastest way to the airport from Stockholm Central Station is the Arlanda Express high-speed train service, making the trip in 20 minutes. The ticket price is fairly high at 280 kr for an adult (26 or older) as of 2018. If you buy tickets on the train, it's even more expensive as a 100 kr printing fee is applied. However, various combo, student/child and advance deals are avalable to the point that four children under 18 can travel free on each adult ticket and said ticket can cost only 154 kr if bought 90 days early - see here for more details.
It is possible to use the Stockholm commuter rail service (Pendeltåg) between Uppsala C and central and southern Stockholm. This route takes 38 minutes between Arlanda C station and Stockholm C. The fare is higher from Arlanda compared to other journeys on the commuter rail network (single ticket is 152 kr and supplement to active tickets such as day tickets costs 120 kr), but less than the Arlanda Express. To avoid paying the supplement, one can take the commuter rail service going to Marsta and trasfer to a 583 bus.

Bus

Flygbussarna, Flixbus, and SL operate coaches to and from the airport which stop at some locations in northern Stockholm County and at Stockholm City Centre and Stockholm Central Station. There is also a local bus line no 583 to Märsta, from where there are commuter trains to Stockholm and surroundings, the cheapest way of getting to/from Stockholm (a bus ticket which includes commuter train to stockholm cost 44 kr as of April 2018). Bus 801 takes around 40 minutes to Uppsala and departs every 15 to 30 minutes.

Road

The motorway E4 goes past the airport and connects Arlanda with central Stockholm as well as Uppsala and other cities further north. Terminal parking, short-term and long-term parking is available at the airport. The low price long-term parking requires a free shuttle bus ride. The bus departs every 8–15 minutes. There are rental car facilities at the airport.

Taxi

All taxi companies are required to offer fixed prices when going from the airport, which takes away the guesswork of how much the fare will cost (you can still request use of the taxi meter). Most major companies also offer fixed prices to the airport.
Taxi fares are unregulated in Sweden, meaning taxis can claim any price as long as they follow the price list shown in the taxi and stuck on the side window. But taxis at the Arlanda taxi stations are not allowed to charge more than 675 kr for at single trip to Uppsala or the northern parts of Stockholm.

Despite being the largest airport in Sweden, Arlanda is not huge but rather walkable. You can take a free one minute train ride between terminals 2/3 and 5.

There are two playgrounds run by Junibacken, an Astrid Lindgren-themed theme park in Djurgården in Stocksholm. The playgrounds can be found at terminals 4 & 5 after passing security.

Lounges

• Menzies has one lounge at terminal 2 and two lounges at terminal 5.
• SAS lounge has two longes, one at terminal 4 an one at terminal 5.

• Stockholm Arlanda Lounge

  address: End of Terminal 5, at the Gate F26-F69 wing
  For Emirates First Class and Business class, Qatar Airways (Platinum, Gold, Silver Members, Oneworld Emerald, Sapphire, Ruby Members), Ukrainian International Airlines Business class, Novair, Air Serbia, IranAir and Rossiya Business Class. Coffee, tea, cold beverages and a cold buffet is served. Free access to Wi-Fi and newspapers.

A lot of restaurants, cafés and bars can be found at terminals 2, 4, 5 and at "Sky City", outside the transit zone between terminals 4 & 5. Terminal 3 only has a café which serves hot drinks and pastry.
Bottled water is expensive at Arlanda; 20 kr or more for a 50 cL bottle (similar to the price at gas stations throughout Sweden). Since Swedish tap water is of excellent quality, a workaround is to bring a refillable bottle to the airport, and fill it up from the toilet tap (after security). Some terminals have drinking fountains.

Sky City

• Alfredo's

  phone: +46 8593 607 80
  Serve pizzas, kebabs and Swedish meatballs, among other things.

• Indochine

  phone: +46 8593 612 23

• Itamae Sushi

  phone: +46 830 03 31

• Kitchen & Table

  phone: +46 8 444 18 00
  Hotel restaurant of Clarion Hotel

Terminal 2

• O'LearysPub style. Sports on TV

Terminal 4

• O'LearysPub style. Sports on TV

Terminal 5

• Andersson Food & Akvavit

  phone: +46 8 585 541 92
  Serves Swedish tapas and the traditional liqueur "Akvavit" along with other alcoholic drinks.

• Beijing8

  phone: +46 8522 35 500
  An indoor food truck offering Chinese cuisine.

• Pontus in the Air

  phone: +46 76-014 14 94
  The only airport restaurant in Sweden mentioned in the White Guide.

• Sky City ArlandaThe airport's main shopping mall.

The airport has an open Wi-fi called Airport-Guest. Usage up to 3 hours and 100 megabytes is free. Additional megabytes or hours can be purchased, one hour costing 50 kr and 24 hours costing 130 kr. Wi-fi support is open daily 06:00-22:00, and can be reached at +46 10-109 04 50.

Banking and currency exchange

SEB has a banking office in sky city and an exchange office by terminal 5 before security. Forex bank can be found before security at terminal 2 and SkyCity, and after security at terminal 5. X-Change has two exchange offices by terminal 5, before security, and a third one by the terminal 5 arrival hall.
Stuck with old Swedish currency? Exchange offices will trade these, see "Stockholm: Cope / Getting cash".
Cash withdrawal machines dispensing Swedish kronor can be found at plenty of places around the airport. The machines found in the departure hall in Terminal 5 also dispense euros.

Dry cleaning

• SkyCity-tvätten (+46 8 593 616 90), located at SkyCity, offer dry cleaning and shoe repair services.

Health care

• The Airport Sky healthcare clinic

  phone: +46 8 522 967 30
  Offer vaccinations and counseling with doctors or nurses.
• Two pharmacies can be found at the airport. One by SkyCity (M-F 07:00–20:00, Sa 09:30–17:00, Su 09:30–20:00) and one at terminal 5 after the security (opens one hour before the first flight from terminal 5 and closes as the last flight from the terminal departures.)

Post services

There are two post boxes at the airport, one by terminal 4 before the security and one by Sky city.

Religious services

There is a chapel by terminal 5 before the security. It is staffed by a priest from the Church of Sweden from Monday to Friday, but is open to people from all religious backgrounds. It is also possible to book the chapel for wedding ceremonies.

Security

• Police office

  phone: 114 14 (non-geographic number)
  address: Tullvägen 7
• Storage boxes (+46 10-410 02 00) can be found at terminals 2, 4 & 5 before the security.
• There is a lost and found desk by terminal 5 before the security for goods lost at the airport. For goods lost on flights contact your specific flying company.

• Clarion Arlanda

  phone: +46 8 444 18 00
  address: Tornvägen 2, Sky City Arlandia Airport
  An up-market hotel within the airport complex.

• Good Morning Arlanda

  phone: +46 8-655 01 00
  address: Lindkrogsvägen 7
  3-star hotel with free shuttle to airport.

• Jumbostay

  phone: +46 8-593 604 00
  address: Jumbovägen 4
  A bit different: this is an old Boeing 747 Jumbo jet converted into a backpackers' hostel. Everything inside is new and clean, and linen comes included on made beds. Flat screen TVs in each room are a luxury for hostels, and if you really want to splash out, there is the cockpit suite. On the downside, not much of an atmosphere once you get over the novelty of staying in a jet.

• Radisson Blu Arlandia

  phone: +46 8 50684000
  address: Kabinvägen 3
  Comfy 4-star hotel 5 min from terminals (opposite "Jumbostay"), no aircraft noise, good restaurant & bar.

• Rest and Fly

  phone: +46-855-055505
  A low-cost hotel. You can also book a day-room, or just a shower.

• Stockholm is the capital of Sweden and by far its largest city. 35 km South of Arlanda
• Sigtuna one of Sweden's first cities, now a small picturesque town by the shore. 12 km west of Arlanda.
• Knivsta is a suburb with a millennial heritage.
• Uppsala was the political and religious centre of Viking era Sweden, and home to the largest church and oldest university in the Nordic countries. 25 km North of Arlanda.