The Brazilian defender insisted that he would welcome a loan switch to the Lisbon giants, but added that his future is still undecided.
United manager Sir Alex Ferguson is keen to farm the 21-year-old out on loan to allow him to gain first-team experience, with Benfica supposedly prepared to offer him guaranteed regular playing time.
"I know Benfica very well. We watch a lot of their games in Brazil. Everybody back home follows them. They're a great team and a move there would be good for me, no doubt about that," Fabio stated to Maisfutebol.
"I do not think that I would have any problems to adapt to Lisbon. I have a Portuguese passport and speak the language. I believe the Portuguese league would be a good step for me. They almost always do well in European competitions."
Despite his promising assessment, Fabio admitted that there is no certainty at this stage that he will leave Old Trafford.
"I have not been in touch with Benfica yet, though. Nothing has been decided about my future. I will know more by the end of the season."
Fabio has made just five Premier League appearances for United in 2011-12.
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