FWIIW, Travelocity is showing AA and CO fares of about $275 plus tax from CDG to NYC. You might try using Travelocity's Dream Maps starting from CDG, noting the cheaper fares, then checking for fares from your homebase to the cheapest CDG cities. Note that international fares are not always the same starting from either end, so check when you find a fare conbination you like. Note also that trans Atlanttic taxes tend to run near $100 from the U.S., so you will want to compare them to Canadian trans Atlantic taxes.