If you have a stack of American Express Membership Rewards points burning a hole in your pocket, your summer travel planning just got a massive boost. From June 2 through June 30, 2026, Amex is offering a 25% transfer bonus when you move your points over to Air France-KLM Flying Blue.

This is an incredibly valuable promotion. Flying Blue is already one of the strongest frequent flyer programs for transatlantic travel, and a 25% bump makes your points go much further. The bonus is hard-coded into the US Amex portal, meaning you’ll see the increased rate instantly when you transfer.

The Details:

• Promo Dates: June 2 – June 30, 2026

• Bonus Amount: 25% (1,000 Amex Points = 1,250 Flying Blue Miles)

• Limits: Unlimited use, though capped at 999,999 points per individual transaction.

• Transfer Time: Generally instant.

Why Flying Blue is a Great Target

Air France and KLM make significantly more award space available to their own Flying Blue members than they do to SkyTeam partners like Delta SkyMiles. Given Delta's persistent point devaluations, Flying Blue is consistently the best mechanism for booking premium cabin travel across the Atlantic.

Furthermore, if you happen to hold Flying Blue Platinum status, you gain access to an even deeper pool of saver award availability that basic members can't see, making this bonus an absolute no-brainer.

Should You Transfer Speculatively?

Normally, the golden rule of award travel is never transfer points without a specific redemption in mind. Keeping your points flexible protects you from sudden airline devaluations.

However, if you frequently fly to or through Europe, Flying Blue is a rare exception where a speculative transfer can make sense. Because 25% is as high as Amex transfer bonuses to Flying Blue ever get, it's a stellar opportunity to top off a low mileage account if you know you'll be booking travel in the coming months.

Pro-Tip: Check your Amex Offers before transferring! Some users are targeted for an additional Amex Offer granting 20,000 bonus Membership Rewards points for spending $1,000 or more directly with Air France or KLM, allowing you to double-dip on your travel planning.