American Express is offering a 35% bonus on transfers from Membership Rewards points to Flying Blue, the frequent flyer program from Air France and KLM.
The bonus lasts only a week, between September 10 and September 16, 2012, so you need to act fast.
Flying Blue offers the option to redeem one way award travel at half the price of roundtrip.
Also it offers “promo awards”, through which, you need just half the usual points required to travel from certain cities to any Air France or KLM destination in Europe. The cities you are flying from change every two months.