A native of Carrigaline, County Cork,[1] Honohan attended St Francis College Rochestown,[2] and began playing football with local side Carrigaline United before joining the academy of Cork City in 2018, where he spent a year at under 17 level, followed by another year at under 19 level, before signing his first professional contract with the club in August 2019.
[3][4] Honohan made his senior debut for Cork City on 30 August 2019, coming off the bench in the 76th minute of a 4–2 defeat at home to Sligo Rovers in the League of Ireland Premier Division, in newly appointed manager Neale Fenn's first game in charge of the club.
[8] Honohan became a mainstay in the team in 2022 as he featured 21 times in all competitions, scoring twice as his side won the 2022 League of Ireland First Division to gain promotion.
[10][11][12] Honohan featured 39 times in all competitions in the 2023 season, scoring 2 FAI Cup goals, in a season which ended on 10 November 2023, when the side lost the 2023 League of Ireland Premier Division Play-off 2–1 to Waterford at Tallaght Stadium, resulting in relegation back to the League of Ireland First Division.
[14][15] He made his debut for the club on 9 February 2024 in the 2024 President of Ireland's Cup, scoring his sides second goal in a 3–1 win over St Patrick's Athletic.