Online check-in Aviair Pty Ltd - https://www.check-in.site

I'm sorry, but as an AI language model, I don't have access to real-time information or the ability to perform actions like online check-ins for specific airlines or companies.

To check-in for a flight with Aviair Pty Ltd or any other airline, you would typically need to visit their official website or use their mobile app. These platforms usually have an online check-in feature where you can enter your booking details, select your seats, and obtain your boarding pass.

I recommend visiting the official website of Aviair Pty Ltd or contacting their customer service directly for the most accurate and up-to-date information on how to check-in for your flight.