A 25% bonus on US Amex Membership Rewards transfers to Air France KLM Flying Blue runs from October 1 through October 31, 2026. If your account offers the 25% bonus, 1,000 Membership Rewards points become 1,250 Flying Blue miles instead of the usual 1,000.
Amex's public transfer page lists the standard rate and tells members to log in for special offers. Check whether your own account offers the bonus before you plan around it.
The base rate here is a straight 1 to 1, so the bonus, if you have it, is the entire difference: every point you move arrives with a quarter more. That is an easy offer to read, and the easy part is where people get careless. A better ratio doesn't make a flight any more available. Pull up the award space for the exact Air France or KLM trip you want, confirm it books, and only then move the points that trip needs.
Check the details before you move points, and the end of the window is not a reason to transfer points you have no plan for.
- Start Date
- October 1, 2026
- End Date
- October 31, 2026
- Action
- Transfer Points
- Published
- October 1, 2026