Online check-in Astra Airlines - https://www.check-in.site

I apologize, but as of my last knowledge update in September 2021, Astra Airlines was a Greek airline that ceased operations in 2017. Therefore, it is not possible to provide information about online check-in for Astra Airlines as it is no longer in service. It's recommended to check with other airlines or the current status of Astra Airlines to obtain the most up-to-date information.