The Brazil international left the Portuguese giants for Stamford Bridge in 2010 but suggests he could head back there at some point in the future.
"Football is full of surprises and I would like to return one day," Ramires told a press conference.
"Benfica have a great team with a great history, a great manager. They have only been lacking titles recently.
"I've still got a tremendous amount of affection for Benfica, not just because they opened the door to Europe for me but because of all the things I experienced there, how they welcomed me and how well everything turned out. I can only thank the club."