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Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,460
CDG outbound passport control can have very long lines now, although some of the worst seem to affect flights to the USA, which presumably you're not doing.
Even if it's one ticket, you would have the problem of the delivering airline (UA) being responsible for rebooking if they're late, but AF is in a different terminal.
I absolutely would not attempt this, especially without an EU passport, ideally the type that works in the automated gates at CDG.