The short answer
Air France/KLM Flying Blue drops a rotating set of discounted promo awards each month (release timing is now variable, no longer reliably the 1st) (data/sweet_spots.json notes, 2026-04-13). The best ones knock business class to Europe down to 45,000 miles one-way (sometimes 40K) from the usual 50-65K. Flying Blue takes 1:1 transfers from all five major US transferable currencies: Chase UR, Amex MR, Citi TY, Capital One, and Bilt (Chase transfer partners, chase.com; Amex MR transfer partners, awardtravelfinder.com).
Active this month
No active transfer bonuses to air_france_klm right now. This page refreshes automatically when new promos land in our data feed.
How to book
- Open the Flying Blue promo page when the new cycle drops (timing is now variable, not always the 1st). Bookmark flyingblue.com/en/earn-spend/spend-miles/promo-rewards or check our
data/bonuses.jsonfeed. - Identify a route you want: the promos are pre-filtered by origin country, so set your search to the US.
- Check availability on flyingblue.com or via Google Flights (filter to Air France, KLM, Delta partner awards). Book-by dates matter: promo fares usually require ticketing within 15-30 days of when the promo list was published.
- Transfer Chase UR, Amex MR, Citi TY, Capital One, or Bilt to Flying Blue 1:1 (verified via data/sweet_spots.json, 2026-04-13). Transfer time is instant to a few hours. Amex MR has historically run transfer bonuses to Flying Blue, most often at 20-25% (peak was 30% in 2021), roughly 2-3 times a year (AwardTravelFinder bonus history). Watch our
data/bonuses.jsonfeed. - Book. Flying Blue's website has a 2024-era redesign that still sometimes errors on partner award searches. Retry in incognito or use miles-search-tools to identify the fare before going to the booking page.
What can go wrong
- Promo routes rotate. What's 45K this month might not be next. The discount applies to specific origin-destination pairs, not blanket.
- Taxes and surcharges on KLM/Air France metal. Flying Blue raised business-class surcharges by $100 in March 2026. US-departing business awards now run approximately $350 one-way in taxes and YQ (Frequent Miler, 2026). Partner flights (Delta, Virgin Atlantic) carry less but sometimes disappear from the search.
- Amex transfer bonus timing. Amex MR to Flying Blue transfers at 1:1 baseline for US cardholders (awardtravelfinder.com). Promotional bonuses of 20-25% (peak 30%) run 2-3 times per year historically. Factor in the bonus window before you transfer.
- All five major US currencies work here. Chase UR, Amex MR, Citi TY, Capital One, and Bilt all transfer to Flying Blue at 1:1. This is one of the few sweet spots reachable from Chase.
April 2026 snapshot
This month's business-class discount is narrower than the usual cycle. The 45K business-class rate applies only from Portland (PDX) to Europe (not the broader 13-city economy list). The other North American origins get economy at 18,750 miles each way but no business-class promo this cycle (Frequent Miler; OMAAT).
- Book by: 2026-04-30
- Travel through: 2026-09-30
- Business class origin this month: PDX only (round-trip bookable as one-ways, 90K total)
Sources: Frequent Miler, April 2026 Flying Blue promo, One Mile at a Time, Prince of Travel.
Our own data/bonuses.json shows no active transfer bonus from any US issuer to Flying Blue as of 2026-04-15 (verified via data/bonuses.json, 2026-04-15), so the 45K PDX rate is the straight cost with no stacking available this cycle. When Amex runs a 20-25% MR bonus to Flying Blue (historically 2-3 times per year, per AwardTravelFinder bonus history), the effective mile cost drops to roughly 36-38K MR, which is when this sweet spot shines.
Our pipeline, 2026-04-15: we found two non-promo Flying Blue business-class openings. BOS-CDG and BOS-AMS, both 2026-04-28 at 60,000 miles (pipeline pull, 2026-04-15). Those are the standard Flying Blue business rate, not the 45K PDX promo, but they illustrate that regular business space exists alongside the promo calendar. If you're in BOS and the calendar works, 60K is still a reasonable rate when the promo doesn't match your origin.
The May 2026 promo will drop when Flying Blue publishes it (timing varies). If you want a non-PDX business-class 45K route, watch our data/bonuses.json feed and this page's updated_at for the May 2026 refresh.
(A screenshot of the Flying Blue promo page will replace this source list once we can pull it directly. The site's heavy JS blocks our research tooling from a clean fetch.)