Amex Membership Rewards: 20% Bonus When You Transfer to Aeromexico (Ends Oct 31)

If you've been sitting on a pile of Amex points and eyeing a trip to Mexico, there's a new transfer bonus that might be worth a look. American Express is running a 20% bonus when you move Membership Rewards points over to Aeromexico. It's not the most generous offer we've ever seen, but it's been a while since the last one, so if you have a use for Aeromexico miles, this could be your window.

What You Actually Get

Normally, when you transfer Amex points to Aeromexico, every 1,000 Membership Rewards points turns into 1,600 Aeromexico KM (that's the name of their loyalty currency). With this promotion, that same 1,000 points gets you 1,920 KM. It's a straight 20% bump, nothing complicated.

So if you transfer 10,000 points, you'd normally land 16,000 KM. During the bonus, you'd get 19,200 KM. That extra 3,200 KM could be enough to cover a short domestic hop in Mexico or shave down the cost of a longer itinerary.

How This Stacks Up Against Past Offers

A 20% bonus is decent, but it's not the best we've seen for Aeromexico. Back in 2019 and 2018, Amex ran 25% bonuses. And even as recently as April 2025 and May 2024, there were 20% offers. So this isn't a rare unicorn, but it's also not nothing.

The bigger point: it's been a while since the last Aeromexico transfer bonus. If you've been waiting for one, this is the first decent opportunity in some time. That said, if you're not in a rush, you might hold out for a 25% bonus—though there's no guarantee one will come around soon.

Should You Jump On It?

Only you can answer that, but here's a simple rule: never transfer points speculatively. Transfer bonuses are tempting, but they're only worth it if you have a specific award in mind and you've confirmed availability.

Aeromexico's program, Club Premier, has some sweet spots—especially for flights within Mexico or between the U.S. and Mexico. But it's not part of a major alliance, so your options are more limited than with, say, Avianca LifeMiles or British Airways Avios.

If you already know you want to fly Aeromexico and you've found the award seats you need, then yes, this bonus makes sense. If you're just hoarding miles for a rainy day, skip it. Points are too valuable to move without a plan.

A Few Things to Watch Out For

First, the bonus is valid until October 31, 2026. That sounds like a long time, but award inventory can disappear quickly, so don't wait until the last minute if you have a specific trip in mind.

Second, transfers from Amex to Aeromexico are not instant. They can take a few days, sometimes longer. Don't transfer points the day before you need to book—you might miss the seat.

Third, remember that Aeromexico KM expire. Check the expiration policy before you transfer a large amount. You don't want to lose miles because you didn't use them in time.

• Transfers are not instant—plan for a few days of processing time.
• Aeromexico KM have expiration rules; make sure you can use them before they expire.
• The bonus applies only to transfers made during the promotional period.

Bottom Line

• 20% transfer bonus from Amex MR to Aeromexico runs through October 31, 2026.
• You'll get 1,920 Aeromexico KM per 1,000 MR points instead of the usual 1,600.
• This matches recent 20% bonuses but falls short of the 25% offers from 2018 and 2019.
• Only transfer if you have a specific award booking in mind and confirmed availability.
• Transfers aren't instant, so leave buffer time before you need to book.

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