Online check-in B&H Airlines - https://www.check-in.site

I apologize, but as of my knowledge cutoff in September 2021, B&H Airlines ceased operations in 2015. The airline was based in Bosnia and Herzegovina and operated from 1994 to 2015. Since the airline is no longer in operation, it is not possible to perform an online check-in for B&H Airlines. However, please note that airline information can change over time, so it's always a good idea to check with the official sources or relevant websites for the most up-to-date information.