Onana, 30, spent the season on loan at Turkish club Trabzonspor after losing his United starting position to Belgian goalkeeper Senne Lammens, who joined from Royal Antwerp for £18.1m last summer and has performed excellently as United's number one throughout the campaign. The Cameroonian is playing his final match for Trabzonspor in the Turkish Cup final on Friday, having missed last week's defeat to Genclerbirligi through injury.
The trigger for Onana's departure from Manchester United's first-team plans came in August, when he made two costly errors in a League Cup defeat to League Two club Grimsby Town. He was booed by sections of United's support during what proved to be his last appearance in the shirt before the loan was arranged, and did not start the Premier League season despite being fit for the opening fixture against Arsenal.
United's goalkeeping structure for next season is taking shape. Lammens is the uncontested number one, though he is expected to be away at the World Cup with Belgium and therefore unavailable for United's first pre-season friendly against Wrexham in Helsinki on July 18.
Veteran Tom Heaton, 40, is expected to sign a new one-year contract. Altay Bayindir, 27, is expected to join Besiktas. Radek Vitek, 22, has already returned to the club from a loan at Bristol City where he won the Player of the Year, Players' Player of the Year and Young Player of the Year awards.
Onana's contract runs until 2028, and his salary is set to increase by 25 per cent on July 1 following United's Champions League qualification — a contractual trigger that increases the urgency of finalising a sale before that date if at all possible. The club are understood to be open to proposals from any interested parties. Clubs in France, Spain and the Middle East have been credited with interest in the goalkeeper at various points this season.
He joined United from Inter Milan in the summer of 2023 having been fundamental to the Italian club's Champions League final run that season, and won the Carabao Cup in his debut campaign at Old Trafford. The broader picture of his time in Manchester, however, will be defined by the errors and the loan — not the trophy.