Sondre Turvoll Fossli (born 10 August 1993) is a Norwegian cross-country skier who competed between 2010 and 2019.

He won his only World Cup race in the individual classic sprint event in Rukatunturi on 27 November 2015.

[1] On 12 August 2019, Fossli suffered sudden cardiac arrest while out on a car ride with his girlfriend in Oslo.

He spent ten days at the hospital, but the physicians were not able to find the cause why his heart stopped beating.

[3] As a result of the cardiac arrest, he announced his retirement from cross-country skiing in April 2020.