From cheapflights:

If you’re thinking ahead to fall vacations, Air France has a deal for you. Book flights to Europe from Aug. 31 to Oct. 24, 2009, for as low as $243 one-way.

Air France launched an airfare sale from select U.S. cities to Paris, Greece, Barcelona, Rome and more. You’ll have to book your travel by July 15 to get these cheap flights.

The select fares below are one-way based on a round-trip purchase and include the fuel-surcharge.

Washington D.C. – Paris: $257
Chicago – Paris: $279
New York – Nice: $298
Boston – Paris: $322
Los Angeles – Nice: $331
Washington D.C. – Athens: $243
Boston – Barcelona : $254
New York – Rome: $268

Click here for information at Air France