You can transfer points to Air France-KLM's Flying Blue program from virtually all major flexible reward programs in 2026. The primary credit card partners include American Express Membership Rewards, Chase Ultimate Rewards, Capital One Miles, and Citi ThankYou Rewards, all of which typically transfer at a 1:1 ratio. Additionally, you can transfer points from Bilt Rewards and Wells Fargo Rewards. For those with hotel loyalty points, Marriott Bonvoy points transfer to Flying Blue at a 3:1 ratio, with a bonus of 5,000 miles for every 60,000 points transferred. Because Flying Blue is a member of the SkyTeam alliance, these transferred miles can be used to book flights on partner airlines like Delta, Virgin Atlantic, and Korean Air. In early 2026, Flying Blue remains one of the most versatile "sweet spot" programs for transatlantic travel, especially when utilizing their monthly "Promo Rewards" which can offer up to 50% off award flights to Europe.