The efficient and comfortable design of Turkish Airlines ARN Terminal at Stockholm Arlanda Airport is impressive. There is clear signage and competent staff to help with the smooth check-in procedure. Modern in style, the terminal offers plenty of seats as well as a variety of dining options to suit a wide range of palates. The well-kept lounges provide a calm environment to unwind in before your journey. But the terminal can get quite busy during rush hour, which could mean lengthier lines for boarding and security. While there are a few small spots where Turkish Airlines ARN Terminal might do a better job managing large passenger loads, overall, traveling there is a pleasant experience.