Online check-in Aviastar - https://www.check-in.site

I'm sorry, but as of my knowledge cutoff in September 2021, I don't have specific information about Aviastar, an airline or travel service. Aviastar may be a regional or local airline that operates in a specific country or region. It's best to visit Aviastar's official website or contact their customer service directly for information regarding online check-in procedures and requirements. They will be able to provide you with the most up-to-date and accurate information regarding their online check-in process.