You have got the option to check-in for your flight the night before: at check-in desk no. 5 from 6 p.m. to 9 p.m. for all flights of the next day (except for Ryanair, Germanwings or other Low Cost Carriers).
Tel. Info +43-662-8580-251.

Important notice to airberlin & Niki!
For all flights with airberlin group (Air Berlin and NIKI) there is a charge of € 5,- for the night before check-in. Free of charge are children under 12 years, business class passengers and holders of the topbonus gold/silver/service/counter card (plus one accompanying person).

General Information about Late Night Check-in:

Like during normal check-in all passengers travelling have to present themselves personally for security reasons e.g. passenger profiling. In exceptional cases (e.g. infant sleeping at home) the pre-check-in can be arranged for all family luggage and all boarding passes printed with the boarding pass for the missing passenger to be picked up at check-in next morning until 45 minutes prior departure. No queuing required.

Having completed your Late-Night-Check-In you are kindly asked to remain in the terminal for another 15 minutes to allow your baggage to pass the multi-level baggage security check.

Overnight camping in the terminal building is not permitted due to safety reasons (insufficient lighting, locked emergency exits, no guard).