If you are a member of American Express Membership Rewards you can transfer your Membership Rewards points, in 250 point increments, to your Air France Flying Blue account. Usually, 1000 American Express Membership Rewards points equals 1000 Flying Blue Miles.
But through June 15, 2018, Amex is offering a 25% transfer bonus to Flying Blue. Instead of the normal 1:1 transfer ratio, when you transfer 1,000 Amex points to Flying Blue, you will end up with 1,250 miles. If you need Air France Flying Blue Miles, consider transferring before 6/15.
