Transfer Marriott Bonvoy to Iberia Plus (Avios) — ratio, bonuses, sweet spots

How to transfer

The deal

1:1

Marriott Bonvoy → Iberia Avios

Not instant

Open Marriott Bonvoy →Open Iberia Avios →

Cents per Iberia Avios point

Economy

1.3¢

Business

1.6¢

First

—

Approx value per point on average bookings. Sweet-spot redemptions can hit 4¢+ per point.

Do this first

Confirm award space on Iberia Avios BEFORE you transfer

Transfers are final and cannot be reversed. Open Iberia Avios'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 Iberia Avios award search →

What you should know

You need a free Iberia Avios account

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

Create Iberia Avios 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

€25 fee on Iberia-operated flights only. Partner awards (AA, BA, JAL) forfeit all Avios — only taxes refunded. Major footgun.

Fee: ~$28Window: Anytime pre-departureTaxes: Partial refund

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.
Iberia Avios: Iberia Plus Avios expire after 36 months of no activity. Note: Avios in BA/Iberia/Qatar/Aer Lingus pools sync, so activity in one program protects the others — but the pools must be linked.

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 Iberia Avios.
4
Pick Iberia Avios, enter your member number and amount
On the Transfer Your Points form: choose Iberia Avios in the Frequent Flyer Program dropdown, type your Iberia Avios 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 Iberia Avios account must EXACTLY match your Marriott Bonvoy name.