After having played youth football for Silkeborg IF, Flø was promoted to the first team on 23 May 2014, where he signed a professional contract.
On 1 June 2016, after spending two years as a backup behind first goalkeeper, Thomas Nørgaard, it was announced that he would leave the club on a free transfer.
[4] Flø made his professional first-team debut on 24 July 2016, starting in a 1–0 home defeat against HB Køge.
Afterwards, he stated that he wanted to play as a starter, and that he regarded the competition with fellow Vendsyssel-goalkeeper, Simon Enevoldsen as "healthy".
[7] On 13 August 2020, Flø moved to Sønderjyske on a free transfer, signing a two-year deal.