[1] He won a gold medal in the relay with the Finnish team at the 2002 European Orienteering Championships in Sümeg, Hungary.

[1] In 2004, he won a gold medal in the relay with the Finnish team at the 2004 European Orienteering Championships in Roskilde, Denmark.

[1] At the 2006 World Orienteering Championships in Aarhus, Ikonen placed eighth in the sprint, and seventeenth in the middle distance.

[1] At the 2008 European Orienteering Championships in Ventspils, Latvia, he won a bronze medal in the middle distance.

[1] Competing at the 2009 World Games, Ikonen won a silver medal in the mixed relay with the Finnish team, along with Bodil Holmström, Tero Föhr and Minna Kauppi.

[1] Ikonen won a silver medal in the long distance at the 2011 World Orienteering Championships in France, behind winner Thierry Gueorgiou.

[1] He achieved one podium result in the 2014 Orienteering World Cup, placing second in a race in Kongsberg in June.