[3] After helping Skellefteå AIK claim a second straight championship, Aho was rated amongst the top 10 European skaters for the 2014 NHL Entry Draft.

[6] Aho was assigned to the Islanders' American Hockey League (AHL) affiliate, the Bridgeport Sound Tigers to begin the 2017–18 season after attending training camp.

[10] After attending the Islanders training camp prior to the 2018–19 season, Aho was assigned to the Sound Tigers.

[11] On 3 January 2019, Aho and teammate Michael Dal Colle were selected to represent the Sound Tigers at the 2019 AHL All-Star Classic.

[12] Following seven seasons within the Islanders organization, Aho left as a free agent and was signed to a two-year, $1.55 million contract with the Pittsburgh Penguins on July 2, 2024.