The 29-year-old picked up a groin injury in his side’s 2-0 win over Crystal Palace.
And Wenger has confirmed Flamini could be available for his side’s visit to Old Trafford, which comes a week after Saturday’s clash with Liverpool.
"[Mikel] Arteta is back from suspension, [Serge] Gnabry is still out, [Mathieu] Flamini could be available for Manchester United," Wenger told reporters.
The Gunners boss also spoke of his side’s current mindset after losing to Chelsea in the Capital One Cup - their second home loss on the trot - but is confident his squad are ready for high-flying Liverpool.
"The mood is very positive at the moment, our priorities are the league and the Champions League," he said.
"I have complete confidence that we will deal well with this period, the players will be up for it. I learnt a lot about my team during the spring, I know how much we want it.
"We have a good away record in recent years and we suffered at home, Liverpool is an example of that. We had a difficult period at the Emirates last season, it's up to us to get the crowd on our side.
"Suarez and [Daniel] Sturridge are among the top strikers in the league. Giroud has been exceptional since the start of the season and has a different style to Suarez."
