KLM Vienna International Airport (VIE) is the hub for Royal Dutch Airlines, which connects travelers to a variety of international locations as well as its headquarters in Amsterdam (Schiphol). KLM flights normally operate out of Terminal 3, which handles both Schengen and non-Schengen flights. Beginning thirty hours before departure, travelers using KLM from VIE can check in online via the KLM website or mobile app. If you would rather have help in person, KLM Airlines VIE Terminal offers self-service kiosks and airport check-in counters. Arriving at least two hours prior to your flight is advised to give yourself enough time for security checks, baggage drop, and check-in.