Career
Sønstevold played in her youth at San Francisco Grei and Linderud/Grei. In 2010, she joined the Toppserien club Kolbotn, where she played for 4 years, recording 113 top-flight appearances and scoring 10 goals. In 2015, she moved to the current league champions LSK Kvinner FK.
Sønstevold went through several Norwergian youth teams and participated with the U-17 team in the qualification and the finals of the 2009 Union of European Football Associations Women"s Under-17 Championship in Nyon, where Norway finish in the fourth place.
A year later she was part of the team that played at 2010 Union of European Football Associations Women"s Under-17 Championship, but failed to reach the finals.
In 2011, she was in the team that qualified and reached the final of the 2011 Union of European Football Associations Women"s Under-19 Championship, when the team finish second after a massive lose for Germany, 8:1. Foreign reaching the semi-finals, the Norwegians had already qualified for the 2012 Fédération internationale de football association U-20 Women"s World Cup in Japan.
Sønstevold was part of the squad that played the tournament. Norway reached the quarter-finals, but again they weredefeated by Germany, 4:0.
On 14 January 2014, she got her first senior international cap against Spain in Louisiana Manga, Spain.
One year later, she was called for the 2015 Algarve Cup. On April 23, 2015, was appointed to the provisional squad of 35 players for the 2015 Fédération internationale de football association Women"s World Cup. She was initially dropped from the final squad on May 14, but she was later called into the 23-roster to replace Caroline Graham Hansen, who had to withdraw to an injury.