A valid Ukrainian passport is shown to the driver when boarding the bus and the passenger does not need a separate ticket. You can also travel with a passport certificate issued by the police, the border control authority or the Finnish Immigration Service (Migri). The certificate shall bear a stamp and a photograph of the passport issued by the authority.
In the Waltti region you can travel with a Ukrainian passport without a separate ticket as follows:
More information on each traffic area’s own website.