If you’ve got Amex points sitting idle and a European trip in mind, this one’s worth your attention. American Express is running a 25% transfer bonus to Air France-KLM Flying Blue through June 30, and while it’s not the richest bonus I’ve ever seen, it’s a solid offer that sharpens some already-good redemptions. The catch is that it only pays off if you have a specific award in mind.
Transfer Bonus Details
Membership Rewards points normally move to Flying Blue at a flat 1:1 rate. Through June 30, every 1,000 points you transfer becomes 1,250 miles instead. The bonus shows up clearly on the Amex transfer page, and it’s automatic, so there’s nothing to register for in advance.
You can transfer anything from 1,000 to 999,000 points, in 1,000-point increments, as long as you’re enrolled in Flying Blue. Transfers are usually instant, though Amex tells you to allow up to 48 hours. One detail I appreciate: the offer runs the whole month, so you can use it more than once as new points post to your account.
How Often This Comes Around (And Why That Matters)
Amex has run more than a dozen Flying Blue bonuses over the past several years, but they’ve thinned out. The gap between this offer and the last one stretched to about eight months, and the previous couple of bonuses dropped to 20% rather than the 25% on the table now.
For context, the pattern suggests the next one probably won’t surface until sometime next year. If you’re ready to book, I wouldn’t count on a better window arriving soon. That’s the main argument for acting on this one rather than waiting.
Where Flying Blue Miles Actually Shine
The headline value here is business class between North America and Europe, which can go for as little as 60,000 miles one-way on Air France or KLM. With the bonus, that’s 48,000 Membership Rewards points—a genuinely strong rate for a lie-flat seat across the Atlantic. Award space at that level is hard to come by, but it exists; right now there’s a surprising amount of 60K business availability out of New York from January through March 2027.
Flying Blue’s reach goes well beyond its two home airlines. You can book short-haul Delta flights, like Los Angeles to Las Vegas, for 5,000 miles one-way, which works out to roughly 8,000 Amex points round-trip. The program also opens up SkyTeam partners including Virgin Atlantic and Korean Air, plus longer hauls like KLM business class from the U.S. to South Africa via Amsterdam at 115,000 miles, or 92,000 Amex points after the bonus.
Flying Blue prices awards dynamically, so rates move around, but they’re often competitive with other programs, and availability on Air France- and KLM-operated flights tends to be reasonable. Keep in mind that dynamic pricing cuts both ways—the sweet spots are real, but you’ll want to check actual pricing before you transfer.
Stacking With Monthly Promo Rewards
The single best way to squeeze more out of this bonus is to pair it with Flying Blue’s monthly Promo Rewards. This month’s promotion puts economy awards between many U.S. cities and Europe at 18,750 miles one-way—just 15,000 Membership Rewards points once the bonus is applied.
If you can find a discounted business class seat at 45,000 miles, that drops to 36,000 Amex points. Stacking a transfer bonus on top of an already-reduced promo rate is about as good as this currency gets, and it’s where I’d focus first.
The Catches You Need to Know
The biggest trap is expiration. Flying Blue miles disappear if you have no qualifying activity for 24 months, and transferring Amex points does not count as activity. You’d need to actually fly Air France, KLM, or a SkyTeam partner to reset the clock, unless you qualify through an exception like elite status or a Flying Blue Extra subscription. Don’t move points over unless you’re confident you’ll use them within two years.
Two more things worth flagging. Flying Blue awards tend to carry fairly high taxes and fees, which eat into the value of the bonus. And these transfers are irreversible—once your Membership Rewards points become miles, there’s no going back, which is why I’d keep points in flexible currency until I had a booking lined up.
If you’re targeted, there’s an Amex Offer worth 20,000 bonus Membership Rewards points after $1,000 in spend that can help offset those fees, though it only applies to flights departing the U.S., so it won’t help on a one-way award out of Europe. And if you come up a little short on miles, Flying Blue also partners with Bilt, Capital One, Chase, Citi, Wells Fargo, and Rove, and occasionally sells miles outright.
The Verdict
This is a solid, if not spectacular, bonus that makes a genuinely useful program more attractive, especially for business class to Europe at 48,000 points or stacked promo awards for as little as 15,000. The real value depends entirely on having a redemption ready, because the expiration clock, the fees, and the no-takebacks rule all punish speculative transfers. Given that the last bonus was eight months ago and recent ones came in lower at 20%, I wouldn’t wait around if you’re set on a booking. Move your points by June 30, and only after you’ve confirmed the award you want is actually available. What trip would you book with a 48,000-point business class seat to Europe?
