Upvote:3
The question, it it's a real question, might be lacking sufficient details (such as connecting flights being not in a single ticket?), but here is the official information (there is also Russian and other versions there):
Overview
Category applies to travellers who are transiting through Finland to a non-Schengen country. A list of nationalities who require a transit visa is determined in the Visa Code and can be found here. Ukrainian nationals do not require a transit visa. An applicant will have to provide evidence that he/she falls under this category.
See also: