Transfer Marriott Bonvoy to Air France/KLM Flying Blue — ratio, bonuses, sweet spots

How to transfer

The deal

1:1

Marriott Bonvoy → Flying Blue

Not instant

Open Marriott Bonvoy →Open Flying Blue →

Cents per Flying Blue point

Economy

1.1¢

Business

1.5¢

First

—

Approx value per point on average bookings. Sweet-spot redemptions can hit 3¢+ per point.

Do this first

Confirm award space on Flying Blue BEFORE you transfer

Transfers are final and cannot be reversed. Open Flying Blue's site in another tab, sign in, and load the exact flight you want at the points price you expect. Come back only when you're ready to redeem.

Open Flying Blue award search →

What you should know

You need a free Flying Blue account

Marriott Bonvoy asks for your Flying Blue member number during the transfer. Sign up takes a minute and costs nothing.

Create Flying Blue account →

Minimum transfer: 3,000 Marriott Bonvoy points

You can't transfer less than 3,000, and transfers must be in increments of 1,000. Transfer in 60,000-point blocks to capture the 5,000-mile bonus (60K Bonvoy → 25K miles).

2–7 days, sometimes longer

Marriott Bonvoy transfers are processed manually and are the slowest among mainstream currencies. Plan for several days minimum. These are typical times, not guarantees — always confirm award space first because transfers can't be reversed.

Cancellation: cancellation has a fee

€70 cancellation fee. Free for Platinum elites. Promo Rewards are non-refundable.

Fee: ~$80Window: before_checkinTaxes: Refunded minus fee

Points expiration

Marriott Bonvoy: Bonvoy points expire after 24 months without any account activity. A single earn (including from a co-brand card swipe) or redemption resets the clock.
Flying Blue: Flying Blue miles never expire as long as you earn (not just redeem) miles at least once every 24 months. Co-brand card spend or partner activity counts.

Step by step

1
Open Marriott Bonvoy → How to Use Points / Awards
Sign in to marriott.com and hover the Marriott Bonvoy tab in the top navigation. In the dropdown, click "How to Use Points / Awards".
2
Scroll to "Watch Your Points Take Off" and click Transfer Points
Scroll down past the rewards overview to the "Watch Your Points Take Off" section. Read the rules — Marriott transfers in 3:1 blocks, but every 60,000 Bonvoy points earns a 5,000-mile bonus, making the effective rate ~2.4:1. Click the Transfer Points button.
3
Click View All Airline Partners
The Transfer Points to Partners page shows three featured partners. Skip those and click "View All Airline Partners" below to see the full list including Flying Blue.
4
Pick Flying Blue, enter your member number and amount
On the Transfer Your Points form: choose Flying Blue in the Frequent Flyer Program dropdown, type your Flying Blue member number, then enter the Bonvoy points to transfer. Minimum is 3,000 points. To capture the 5K bonus, transfer in 60,000-point increments — you'll get 25,000 miles per 60K (20K base + 5K bonus). The name on your Flying Blue account must EXACTLY match your Marriott Bonvoy name.