In February 2020, he scored against Real Madrid to help his loan club eliminate his parent club from the 2019–20 Copa del Rey at the quarter-final stage. Real Sociedad reached the final of the competition, but it was postponed due to the COVID-19 pandemic in Spain; they also qualified for the 2020–21 UEFA Europa League after finishing sixth in La Liga and the season was a successful one for Ødegaard on a personal level. He missed the end of the season having been diagnosed in June with tendinopathy, a problem that had also occurred some months earlier.