Online check-in Antonov Design Bureau - https://www.check-in.site

As of my knowledge cutoff in September 2021, the Antonov Design Bureau, a Ukrainian aircraft manufacturing company, does not operate commercial passenger flights or offer online check-in services.

The Antonov Design Bureau is known for designing and manufacturing a range of aircraft, including cargo planes and military aircraft. They are primarily involved in aircraft design, engineering, and manufacturing rather than operating commercial flights.

If you are referring to an airline or operator that uses Antonov aircraft for passenger flights, I recommend checking with the specific airline or operator for information about their check-in procedures, including whether they offer online check-in.

If you have any further questions or need additional assistance, please let me know!