Vienna airport re-opened its Terminal 1 on 9 January after a six-month refurbishment programme.
The building, now named "Check-in 1", will accommodate all flights by Air Berlin and its Austrian subsidiary Niki as well as a number of other carriers which had previously been operating out of Terminal 2.
The Austrian hub has closed Terminal 2 for the present. In the meantime, the airport says, it will modernize the baggage transportation system and passenger footpaths in Terminal 2's basement.
Arriving travelers currently walk through the building's disused baggage retrieval hall to reach the central exit area in "Check-in 3", the new terminal complex - formerly known as Skylink - for Austrian Airlines and its Star Alliance partner carriers, which was opened in June.
The refurbishment of Terminal 1 included the installation of new check-in desks, lighting systems and fast lanes in the security area.
30 out of the 44 check-in desks will be used by Air Berlin and Niki. The German airline says it will open an own lounge for premium passengers during the second quarter.