 Aron was named as the permanent captain of the national team before a friendly match against the Faroe Islands in August 2012 at the young age of 23, ahead of his 29th cap.Under his captaincy, Iceland qualified for the play-off round of FIFA World Cup qualification for the first time, where they lost 2–0 on aggregate to Croatia.On 10 October 2014, Aron scored his first senior international goal in Iceland's 3–0 away win against Latvia in UEFA Euro 2016 qualifying.