[1] At club level, Kunnas played for HJK Helsinki, where she won the 1995 Kansallinen Liiga.
[1] In a UEFA Cup match against Røa IL, Kunnas sustained a knee injury which sidelined her for six months.
[3] Kunnas made her international debut for Finland in a 1996 Algarve Cup match against Sweden.
[1] After making one appearance per year in 1996, 1997 and 1998, she became Finland's main goalkeeper after Johanna Lindell retired in 2004.
[1] Kunnas represented Finland at UEFA Women's Euro 2005,[4] where they finished joint third,[4] after losing their semi-final 4–1 to Germany.