Loftus-Cheek has played only 33 minutes since the beginning of Premier League this season and admitted in the summer that he was reluctant to remain at Stamford Bridge if he did not get regular playing time.
The 22-year-old had an outstanding performance during his season-long loan at Crystal Palace last term, and Allardyce now believes the midfielder needs to “build his own career” away from Chelsea.
“I’m disappointed for Loftus-Cheek,” Allardyce told talkSPORT.
“Chelsea have told him he’s going to be a part of the team this season and, if that is the case, they haven’t lived up to that yet.
“What he did for Crystal Palace last season and for England at the World Cup, I thought this would be a big season for him at Chelsea, but it’s simply not happening.
“If I were Loftus-Cheek I would be battering the door down in January and saying, ‘that’s it, I need to get away.
“And not on loan, get away from Chelsea properly and build his own career.
“He’s had the taste of playing first team football at Palace and obviously he loves Chelsea, but it’s not happening for him there.
“He’s got to play. He’s too talented not to play, we’ve all seen that.”