Lotta Udnes Weng (born 29 September 1996) is a Norwegian cross-country skier.

[1] She made her World Cup debut in March 2015 in Drammen, and collected her first World Cup points in December 2016 in Lillehammer with a 22nd place in the 5 kilometres race.

[1] Weng represents the sports club Nes Ski.

[2] All results are sourced from the International Ski Federation (FIS).

This biographical article relating to Norwegian cross-country skiing is a stub.