QPR are in the market for a new goalkeeper with Alex McCarthy having been sold to Crystal Palace and doubts remaining over the future of Rob Green.
Loftus Road boss Chris Ramsey has confirmed that they are interested in Bentley and that he is on a list of goalkeeping targets.
"He's one on our list and there may be a few other players on our list," said Ramsey, as reported by London24. "It's just about doing the deals in time for next Saturday.
“He's just one on our list. I'm not sure if that's going to happen by next Saturday.”
QPR are understood to have tabled a £700,000 bid for Bentley, which was immediately turned down by Southend.
Southend have already rejected an offer from Hull City this summer for Bentley, with the club determined to keep hold of the 22-year-old.
The likes of West Ham United and Nottingham Forest have also been credited with an interest in Bentley - by the Daily Mail and Daily Star - who is regarded as one of the best young goalkeepers in the country after impressing at Southend during the last two years.
It remains to be seen if QPR will come back in with an improved bid for Bentley, with Southend insisting the keeper is not for sale as they prepare for life back in League One this season.