OpenSkies is offering $500 off in May using promo code IADMAY10. It’s clearly targeted at Washington Dulles-originating flyers, though the code appears to work for New York departures as well.
Roundtrips from DC to Paris-Orly can be had in business class for ~ $1250 roundtrip. Considering that United and Air France non-stops (to and from De Gaulle) are running about a thousand dollars in coach, this is a pretty good deal.
(Hat tip: Flyertalk.)