If your points are with Air France (another airline in the same "partnership") I believe you can. And if your points are with the exact same carrier as the flights you also can. But apparently points on one "partner" are not fungible with others, and you can't use Delta miles to book award flights on other carriers' websites.

This was when I found out that frequent flyer experts choose their "home" airline very carefully. To Delta's credit their points never expire...but if they block the flights I want what good are the points?

Their website offered me an alternative: fly with a different partner airline into the destination country then fly domestic on the airline that flies to the actual destination. That was bookable using (a lot of) points, but would make the journey twice as long.