Originally Posted by
PAX_fips
Since I just came back from ARN, some more notes/details :-).
Take the shuttle bus - they have power (230V Europe outlets) +free Wifi!
http://www.flygbussarna.se/en/arlanda
You can buy tickets online, at a vending machine (VISA+PIN) or at the 7eleven (215 SEK return).
Note that you will spend some 45-50 minutes per leg (they depart every 10min over the day) - but they've fastlanes (Taxi not..).
Have fun in Stockholm, it's a very nice city!
The Flygbussarna Airport Coaches are excellent. But, given your brief layover, I'd recommend you take the Arlanda express train.
You don't want to spend your brief stay in Stockholm stuck in a traffic jam.
https://www.arlandaexpress.com/