Early career Born in
Akureyri, Aron began playing football in his native Iceland on gravel pitches. During the winter months, snow and ice left football pitches unplayable and Aron instead played
handball, making three appearances in the Icelandic handball League at the age of fifteen. He began his football career with local side
Þór Akureyri in 2005 and, after investment in indoor pitches by the Icelandic government, began to train all year round. At the age of seventeen, Aron moved to the Netherlands, joining the youth academy at
AZ. After initially struggling with homesickness, he settled in the country and made his debut for the club during the 2007–08 season. He made his debut on the opening day of the Championship season against
Norwich City, where Coventry won 2–0. He scored his first career goal on 14 February 2009 in an
FA Cup match against
Premier League side
Blackburn Rovers. During his time at Coventry, Aron attracted
Premier League interest leading Coventry City to offer him an improved deal on 12 March. His first league goal came against
Crystal Palace. At the end of his first season in England, Aron was voted the Coventry City Supporter's Player of the Year as well as the club's Community Award. The following season, Aron changed his shirt number from 12 to 17, to mirror the squad number of his brother, who is a professional handball player. The following season, he continued as a vital part of the Coventry midfield, throughout the season he made 42 appearances and scored one goal against
Middlesbrough. Coventry City started the 2010–11 season strongly looking like they were pushing for play-off places. Aron opened his season's goal scoring count with a goal against newly promoted,
Millwall, despite Coventry losing 3–1. After three years at Coventry, he scored his first goal at Coventry City's home ground, the
Ricoh Arena, against
Preston North End. Three days later, Aron scored his second goal in two matches against
Doncaster Rovers. He was out of contract at the end of the season and on 10 December, Aron stated his desire to stay at Coventry. However the following week, he received his first red card of his career against
Norwich City. However a deal for a new contract could not be reached between his agent and Coventry, and at the end of the season the club gave him a deadline date to agree to stay. However, due to Aron and his agent not being able to reach an agreement with Coventry, he was linked with moves away and his agent confirmed that fellow Championship outfit
Cardiff City were favourites to sign him.
Cardiff City in 2012 On 8 July 2011, Aron agreed a three-year deal with fellow Championship team
Cardiff City on a free transfer, as the fifth signing for new manager
Malky Mackay. Coventry were due compensation via him being under the age of 24. He made his debut on 7 August in the first match of the new season, playing the full 90 minutes in the 1–0 away win over
West Ham United. In his second match, Aron limped off with an ankle injury after only ten minutes against
Bristol City, the injury sidelining him for a week. He returned after the September international break, insisting his injury was behind him. On 22 October, Aron scored two goals in a 5–3 victory against
Barnsley, receiving the
man of the match award. Aron played the entirety of the
2012 Football League Cup final, as City were beaten 3–2 on penalties after by
Premier League club
Liverpool at
Wembley Stadium. Aron scored Cardiff's first goal in the Premier League on 25 August 2013, against
Manchester City in a 3–2 win. In June 2015 he signed a new contract with the club, until the summer of 2018. Following his return from
Euro 2016, Aron was linked with a move away from the Welsh capital, with
Derby County and
Norwich City claimed to be interested. However, Cardiff City manager,
Paul Trollope, described him as "a very important player" to the club. His performances under Trollope and his eventual replacement
Neil Warnock saw him awarded the club's Player of the Year award at the end of the season. The following season, Aron failed to nail down a consistent place in the starting eleven, due to a number of injuries throughout the first half of the season. Despite his injury problems, Cardiff offered him a new contract, which was later rejected by the player. Aron returned to the side for the final run-in, where he scored the winning goal against
Nottingham Forest and ultimately helped Cardiff gain promotion to the
Premier League. In July 2018, Aron signed a new one-year deal.
Al-Arabi In March 2019, it was announced that Aron would leave Cardiff at the end of the season, and would join
Qatar Stars League club
Al-Arabi. In July 2019, he joined Al-Arabi. In June 2022, he extended his contract by an additional year.
Þór On 1 August 2024, it was announced that Aron would be joining his boyhood club
Þór Akureyri, signing an 18-month long deal. ==International career==