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

I'm sorry, but as of my last knowledge update in September 2021, there is no known airline called "Lion Airlines." It's possible that the airline you're referring to is a new airline that has been established since then or is a regional airline that operates in a specific country or region. If you have any specific questions about a different airline or if you could provide more information about Lion Airlines, I'll do my best to assist you.