Onni Helen is a 21-year-old professional football player from FIN. He plays primarily as a Forward. His current market value is estimated at 150K €.

His most recent move was a from TPS Turku to Sogndal on 2026-01-01.

In the UEFA European U21 Championship qualification 2025-2027 season, Onni Helen scored 0 goals and provided 0 assists across 3 appearances, averaging 0 goals per game with 0 shots attempted and 0 on target.