The 29-year-old's proposed move away from Loftus Road was in doubt after the former Newcastle United midfielder claimed that his desired switch to Ligue 1 was off the table.
Despite the initial collapse, it now appears that Barton has been given the green light to speak to the French club after he posted a photo on Twitter of a private jet with the caption "En route to Marseille..."
Barton later added: "Off to Marseille. It's on. It's off. It's back on again. I am still skeptical...?"
It is understood that the controversial player will spend a season at Marseille on loan.