Guide de ville
Stockholm ARN: What to Do on a Layover
Gamla Stan in 4 hours: medieval lanes, Swedish meatballs, harbor walk.
Getting from the airport
ARN to city center: 37 minutes by rail (Arlanda Express). Trains run every 6 minutes. Service runs 05:00 to 23:30. Skip the taxi unless your connection is under 5 hours.
What to do in Stockholm
The stops worth making: Gamla Stan Old Town, Vasa Museum, ABBA Museum, Djurgården island. Rated above 4.4: Vasa Museum (4.8), Skansen (4.5), The Royal Palace (4.5), Stockholm City Hall (4.7), ABBA The Museum (4.5). You do not need the full tourist circuit. Pick two and commit.
Visa and entry
Stockholm is visa-free for US passports. No application, no fee. The border process at ARN is efficient. Expect 15 minutes or less.
How long do you need
The minimum useful layover is 4 hours. That gives you 37 minutes in each direction plus about 76 minutes on the ground.
ARN airport
ARN has 8 lounges. For short connections under 4 hours, the terminal is the destination: food options, showers, and enough space to reset before the next leg.