The 29-year-old struggled for regular game time at Forest last season, starting just three of his 17 Premier League games, scoring four goals and providing one assist.
Awoniyi became Forest's record signing at the time when he joined from Bundesliga club Union Berlin back in 2022 for £17.2m.
He has now joined Frank Lampard’s Coventry for a fee of £9 million, per BBC Sport, signing a deal for an as yet undisclosed period.
On his new challenge with Coventry City, Awoniyi said: “I’m very happy to complete my move to Coventry City.
“I am very excited about this season, and I can’t wait to get started.
“I’m really looking forward to working with my new teammates, I have seen how amazing they have been last season, coming up from the Championship, they were incredible and now I am just excited to join them and get started for the new season.”