Early career Bentley joined
Manchester United aged nine and remained at the club for five years. In 2015, she joined local rivals
Manchester City due to the limited first team opportunities available at her former club.
Manchester City In July 2017, Bentley signed with the
Manchester City development squad for the 2017–18 season and became a regular for the club. In April 2018, she helped the club win the FA Development League Cup. Bentley was named as an unused substitute for the first team on two occasions as they finished runners-up in the
Women's Super League and the
FA WSL Cup.
Manchester United On 1 July 2018, Bentley returned to her former club and joined
Manchester United ahead of their inaugural season in the
FA Women's Championship, one of seven players to return to the senior side having played for the club at youth level. She made her senior debut as a 59th-minute substitute in a Championship game against
Millwall with the score at 6–0. The game finished 8–0.
2018–19 season: Loan to Sheffield United On 8 February 2019, she was loaned to fellow Championship side
Sheffield United until the end of the season. She played in six games during the loan, conceded four goals and won every game. She assisted fellow Manchester United loanee
Ebony Salmon's goal in a 2–1 win over
Tottenham Hotspur.
2019–20 season Bentley missed the start of the
2019–20 season after suffering a fractured humerus while on international duty with England under-18s.
2020–21 season: Loan to Blackburn Rovers On 1 September 2020, Bentley signed a season-long loan deal with
Blackburn Rovers of the
FA Women's Championship. She made her league debut five days later in a 3–0 defeat to
Leicester City. She made four appearances before United recalled her in December.
2021–22 season: Loan to Bristol City On 6 August 2021, Bentley signed a new two-year contract with Manchester United before joining
Championship side
Bristol City on a season-long loan. She made her debut on 29 August in Bristol City's opening game of the season, a 4–3 defeat to
Crystal Palace. She played 22 games in total, keeping ten clean sheets as Bristol finished third and was named Young Player of the Season at the club's end of season awards.
Bristol City Following a season-long loan, Bentley joined
Bristol City permanently on 1 July 2022 on a two-year contract. Bentley captained the squad as it won the
2022-23 Women's Championship season, earning promotion to the Women's Super League. Bentley won the club's Players’ Player of the Season award, and kept 13 clean sheets to win the Barclays Women's Championship Golden Glove for the 2022–23 season. On 30 June 2025, it was announced that Bentley had signed a new two-year contract with Bristol City. ==International career==