Stockholm-Arlanda to Nyköping train with Malartag

Mälartåg is a Swedish train company from the Mälardalen region operating in the Stockholm, Sörmland, Uppsala, Västmanland, Örebro and Östergötland. Mälartåg's train fleet consists of double-deckers and smaller regional trains with a maximum speed of 200 km/h.

SJ is a Swedish train company that offers a wide range of services to its passengers. It operates high-speed trains, regional trains, and night trains, all of which are comfortable and reliable. The high-speed trains, X2000, are the fastest way to travel between cities, while the regional trains, Pågatåg, are perfect for shorter trips. The night trains, SJ Nattåg, offer a comfortable way to travel overnight. SJ offers a variety of ticket types, including single tickets, return tickets, and SJ Prio tickets, which offer discounts for frequent travelers. Onboard facilities include free Wi-Fi, power outlets, and a café car. The most popular routes for SJ are between Stockholm and Gothenburg, Stockholm and Malmö, and Stockholm and Uppsala.

Arlanda Express is a high-speed train service based in Sweden. It operates between Stockholm Central Station and Stockholm Arlanda Airport, with a journey time of just 20 minutes. The trains are modern and comfortable, with two types of train available: the Arlanda Express Train and the Arlanda Express Airport Train. Both offer free Wi-Fi, power outlets, and luggage storage. The Arlanda Express Train runs every 15 minutes from 5am to 1am, while the Arlanda Express Airport Train runs every 30 minutes from 5am to 11pm. There are two types of ticket available: a single ticket and a return ticket. The most popular routes for Arlanda Express are Stockholm Central Station to Stockholm Arlanda Airport, and vice versa. The service is a convenient and comfortable way to travel between the city and the airport.

Länstrafiken is a collective name for regional public transport authorities in Sweden, responsible for coordinating, planning, procuring, and marketing public transport within their respective counties. For example, Länstrafiken Örebro is the public transport authority for Örebro County, managing all bus services under its brand and co-owning regional train companies like Tåg i Bergslagen and Mälardalstrafik AB. They offer various ticketing options, including single tickets, period passes, and special arrangements for different passenger groups, often accessible through a mobile app. Länstrafiken also emphasizes accessibility, providing services like "färdtjänst" for those with disabilities and free travel for medical appointments.

SL (Storstockholms Lokaltrafik) is the public transport authority responsible for buses, underground trains, commuter trains, trams, and certain ferry lines in Greater Stockholm, Sweden. SL's network uses a unified ticketing system, and the organization contracts with various companies for the operation and maintenance of its services. SL also offers commuter rail connections to Arlanda Airport and tram services to Bromma Airport.