Bonner was part of the Glenswilly team that won its first Donegal Senior Football Championship in 2011, with a 1–8 to 0–9 victory over St Michael's.
[3] He scored a goal in the final of the 2013 Donegal Senior Football Championship following a deft flick of the heel from Michael Murphy.
That same year he was part of the Donegal team that won the 2007 Dr McKenna Cup, as well as the 2007 National Football League, scoring 0–2 in the final at Croke Park.
[12] Bonner voluntarily left Donegal "for good" following the team's penultimate match of the 2008 National Football League, against Laois, a game in which he was substituted.
[15] According to Keith Duggan — writing in The Irish Times in 2013 — Bonner "was among the most conspicuously talented of the county set-up in the uncertain years before Jim McGuinness took over but was absent for the revolution".