Two Flying Blue deadlines land on the same night. American Express is paying a 25% bonus on Membership Rewards transfers to Air France-KLM Flying Blue through 11:59 p.m. Mountain Time on Saturday, October 31, 2026, and Flying Blue's October Promo Rewards — the monthly award sale that cuts selected routes by 25% — must be booked by October 31 for travel through March 31, 2027. Stacked, the two discounts turn a 60,000-mile business-class award into 36,000 Membership Rewards points one way.

That headline number is real, and it is also the cheapest, least flexible ticket Flying Blue now sells. Since September 8, 2026, the lowest award price on Air France and KLM flights buys a Light fare. In business class, Light means one checked bag, no lounge access, and no changes or refunds. The ticket that carries the old flexibility costs 25% more miles — and with the transfer bonus, that version still costs only 45,000 Membership Rewards points one way. The choice tonight is not whether to transfer, but which fare to buy.

Flying Blue has not published an hour for the Promo Rewards booking deadline — its page says only to book in October. Treat Saturday evening as the limit, and do not leave either step to the last minutes of the night.

Exact offer and eligibility

• Transfer bonus: 25% on American Express Membership Rewards transfers to Air France-KLM Flying Blue, October 1 through October 31, 2026, ending at 11:59 p.m. Mountain Time on October 31. The standard ratio is 1:1; with the bonus, 1,000 Membership Rewards points become 1,250 Flying Blue miles.
• Minimum transfer: 1,000 Membership Rewards points. You must be enrolled in the Flying Blue program to participate, and you must hold an eligible U.S. Membership Rewards account.
• How the bonus appears: The bonus is built into the transfer ratio. Before confirming, check that the transfer screen shows 1,250 Flying Blue miles per 1,000 points. American Express warns that the additional bonus miles may take up to 72 hours to show in a Flying Blue account, so a transfer started on October 31 is not guaranteed to be fully usable for a booking the same night.
• Transfers are one-way: Once Membership Rewards points move to Flying Blue, they cannot be transferred back, and they become subject to Flying Blue terms. Taxes, fees, charges and surcharges, including airline surcharges, apply to Flying Blue redemption flights.
• Promo Rewards: 25% off selected Air France and KLM awards. Book by October 31, 2026, for travel through March 31, 2027. The discounted prices are starting prices for the lowest award level on each route — they are not a guarantee that every date has a discounted seat.
• North American Promo Rewards open to all members, one way, starting at: economy 18,750 miles from Boston, Houston, Raleigh/Durham, Montreal, Toronto, Ottawa and Calgary; premium economy 30,000 miles from Miami, Chicago, Las Vegas and Austin; business class 45,000 miles from Seattle and Mexico City.
• Flying Blue Extra-only routes: Some October Promo Rewards require a paid Flying Blue Extra subscription, which starts at 379 euros a year. That includes economy at 18,750 miles from Vancouver, premium economy at 30,000 miles from New York, and business class at 45,000 miles from Orlando and Cancun. Do not assume a route on the list is open to every member — check the access label before transferring.
• Other bonuses ending the same day: Capital One is running a separate 20% bonus on transfers to Flying Blue through October 31 at 11:59 p.m. Eastern Time, at 1,000 miles to 1,200 Flying Blue miles. Rove is running a 40% bonus to Flying Blue that ends at 6:59 p.m. Eastern Time on October 31.

The math: two discounts, one stripped fare

Divide each Promo Rewards price by 1.25 to get the Membership Rewards cost with the Amex bonus. Economy at 18,750 miles costs 15,000 Membership Rewards points one way, against 18,750 points at the normal 1:1 ratio. Premium economy at 30,000 miles costs 24,000 points. Business class at 45,000 miles costs 36,000 points, against 45,000 points without the bonus — a saving of 9,000 points one way, or 18,000 points on a round trip at 90,000 miles for 72,000 points.

The central trade-off is the fare, not the points. The 45,000-mile business price is the Light fare. It cannot be changed or refunded, it includes one checked bag of up to 32 kg, and it does not include lounge access. Flying Blue Platinum and Ultimate members keep free changes and refunds on all three fare types, so the Light restriction bites hardest for members without that status.

The Standard fare on the same Seattle and Mexico City business routes is also discounted by 25% in October: 56,250 miles instead of the usual 75,000. With the Amex bonus, that costs 45,000 Membership Rewards points one way — the same number of points the Light fare would cost without any transfer bonus. Standard can be changed or refunded for a fee of 70 euros per ticket, includes the full baggage allowance, and includes lounge access in business class. For a trip whose dates are not certain, the extra 9,000 Membership Rewards points over the Light fare (45,000 against 36,000) buys back the flexibility the promo price took away.

The other catch is the cash on top. Flying Blue awards carry taxes and carrier-imposed surcharges in addition to the miles, and the amount varies by route and direction. Price the exact itinerary, with its full cash total, before moving any points. A promo award that looks cheap in miles can still be a poor use of points once the surcharges are added, and a transfer made to chase it cannot be undone. This is also a repeat bonus, not a once-a-year rarity — the same 25% Amex bonus ran in June 2026 — so there is no reason to move points speculatively tonight and hope a use appears later.

Who benefits—and who should skip it

Book tonight if: you already have a specific Promo Rewards seat in front of you — a Seattle or Mexico City business-class date, or an 18,750-mile economy seat from one of the listed gateways — you have priced it with taxes and surcharges, your dates are fixed, and you can live with a Light fare or you are paying the Standard price. Travelers with Flying Blue Platinum or Ultimate status get the most from the Light price, because their status benefits survive the fare restrictions.

Transfer for the Standard fare if: the trip matters but the dates might move. At 45,000 Membership Rewards points for a flexible business-class award that normally costs 75,000 miles, the Standard promo is the better version of this deal for most travelers, even though it is not the headline number.

Skip it if: you have no priced award, you would need to buy a Flying Blue Extra subscription to reach the route you want, or the only seat you can find is on a date you are not sure about and you cannot afford the Standard fare. Points moved tonight into a currency you do not yet have a use for are points locked into Flying Blue's award prices, surcharges and Light-fare rules. The November Promo Rewards list arrives on November 1, and it may include a route that fits better — wait for it rather than forcing a booking tonight.

Awardtrail analysis

The stack is genuine: a 25% transfer bonus on top of a 25% award discount, with business class to Europe at 36,000 Membership Rewards points for a Light fare and 45,000 points for the Standard fare that most travelers actually want. The mistake tonight would be celebrating the 36,000-point figure without reading what it buys. Check three things before any transfer: that the award search shows a Promo Rewards seat on your exact date, that the fare shown is the one you are willing to fly, and that the transfer screen shows 1,250 miles per 1,000 points. If any of those three is missing, keep the points at American Express. A bonus that repeats is never worth a one-way transfer into a ticket you cannot change.

Primary source: https://www.flyingblue.com/en/spend/flights/rewards

Verified: October 31, 2026