During the 2014 Allsvenskan, Arnór played 27 out of 30 games in the league, scoring 3 goals. In addition, he had a successful run in the Svenska Cupen, scoring 2 goals in 6 fixtures as Helsingborg made it all the way to the final. On 18 May 2014, his side lost the final against Elfsborg with a score of 0–1.