In the his best overall result is finishing second in 2001, as well as several victories in individual races. Lanki finished overall 6th in the in Ski Orienteering in 1999, overall third in 2000, overall second in 2001, and overall 5th in 2003.
He has achieved silver medals at the world championships, both individually and in the relay. Lanki received a silver medal in the long course at the 2000 World Ski Orienteering Championships in Krasnoyarsk, and a bronze medal in Levi in 2005. He received silver or bronze medals with the Finnish relay team in 1998, 2000, 2002, 2004 and 2005, and finished 5th in the relay in 2007.
