* Senior club appearances and goals counted for the domestic league only.

Until 2001, Aaltonen played for his hometown club Porin Narukerä, with whom he became Finnish champion in 1999.

In 2007/08 he played one season in Russia in Krasnogorsk with Zorki and was Russian runner-up there.

In 2010 and 2011 he reached the final of the Swedish bandy championship with the club, with Bollnäs losing both times.

In 2004 he became world champion with a 5–4 win after Finland's golden goal against Sweden.