Dæhli competed for Norway at the 2012 World Orienteering Championships. In the middle distance he qualified for the final, where he placed seventh, 1:23 minutes behind winner Edgars Bertuks. He was part of the Norwegian team that placed second in the relay at the 2012 World Championships, along with Carl Waaler Kaas and Olav Lundanes. He placed 20th overall in the Orienteering World Cup in 2012. At the 2013 World Orienteering Championships he placed fifth in the long distance, and sixth in the relay with the Norwegian team. In 2013 he placed 17th overall in the World Cup. He competed in the 2014 World Orienteering Championships in Italy, where he placed 11th in the long course. In 2014 he placed 10th overall in the World Cup. He achieved a silver medal in the relay in the 2015 World Orienteering Championships in Inverness, where he also placed fourth in the middle distance, and 13th in the long distance. In 2015 he placed fifth overall in the World Cup. He was part of the winning team in the relay at the 2016 World Orienteering Championships in Strömstad, where he also placed sixth in the middle and sixth in the long distance. In 2016 he placed seventh overall in the World Cup. At the 2017 World Orienteering Championships in Tartu he won a gold medal in the relay for the second time, and placed fourth in the long and ninth in the middle distance.