On 29 February 2016 it was announced that Flynn would sign for Glasgow Warriors at the end of the 2015–16 season.[1]
Flynn had already played in Scotstoun with Toulouse and stated: "When I played at Scotstoun last season, the atmosphere was fantastic and it shows the club has a really good support base. I jumped at the chance to join the Warriors after chatting to Gregor and I'm good friends with Scotland full-back Sean Maitland and he couldn't say enough good things about Glasgow."[2]
On 26 May 2017 it was announced that Flynn was no longer contracted by the Warriors.[3]
Flynn comes from a family with a long history in rugby with his father and two uncles playing for Southland Rugby. One of his uncles, Robbie Flynn, played rugby for the United States, Aaron Flynn, also played for the Crusaders from 1998 to 2002.
After rugby
He returned in 2021/22 for season 2 of Match Fit. He revealed that he lost much of his skills as a lineout thrower, and his career had been marred by shoulder, elbow and ankle injuries, but his anger and frustrations spills over as they were misdirected towards coaches, and also developed drinking problems until he recovered in 2011.[5]
Since retiring, Flynn became a Project Manager for Signature Homes in Christchurch.