Last updated: October 2, 2026
American Express is offering US Membership Rewards cardholders 20% more Aeromexico Rewards from October 1, 2026 through late October. On the bonus ratio, 1,000 Membership Rewards become 1,920 Aeromexico Rewards. The everyday ratio is 1,000 → 1,600.
Usually a pass. Aeromexico Rewards is a program with high fuel and carrier surcharges, expensive cancellation and change fees, and award rates that can run high. A 20% sticker does not fix that. Transfer only when a specific award is already priced and you are ready to book it. Do not pre-fund the program because a banner is ending.
The end date is not clean. AwardWallet says October 30, 2026, 11:59 p.m. MT. Upgraded Points and One Mile at a Time say October 31, 2026, 11:59 p.m. MT. Read the date on your own Amex transfer screen. That screen wins.
Before you move points: Plug your spending into the credit card optimizer so you know whether Membership Rewards is the currency you should be earning. An airline transfer bonus does not fix a wallet that should be on a different card.
The promo, without the fluff
This offer lives on the US Amex Membership Rewards transfer tool. Confirm the Aeromexico line before you click. A screen that still shows 1,600 Aeromexico Rewards per 1,000 Membership Rewards means this bonus is not on the transfer you are about to make.
| Detail | What you actually get |
|---|---|
| Window | October 1 through late October 2026. AwardWallet: Oct 30, 11:59 p.m. MT. Upgraded Points and One Mile at a Time: Oct 31, 11:59 p.m. MT. Confirm on your Amex screen |
| Who | US Amex Membership Rewards |
| Base ratio | 1,000 MR → 1,600 Aeromexico Rewards (1:1.6) |
| Bonus ratio | 1,000 MR → 1,920 Aeromexico Rewards (1:1.92, a 20% bonus) |
| Increments | Often cited as 1,000 Membership Rewards |
| Range often cited | 1,000–999,000 Membership Rewards |
| Speed | Often immediate; terms allow up to about 3 days (AwardWallet) |
| Direction | One-way. Submitted transfers do not unwind |
Do not send points and hope a separate 20% posts later. The bonus that matters is the ratio on the screen at the moment you transfer.
Other live offers are on the transfer bonuses page.
The only math that matters
At 20%, you get 1.92 Aeromexico Rewards per Membership Rewards point. That is 20% more Aeromexico than the usual 1.6:1 — which means you need about 17% fewer Membership Rewards for the same Aeromexico award (1 ÷ 1.2 ≈ 0.833).
20% bonus (1,000 → 1,920)
| Membership Rewards transferred | Aeromexico at 1:1.6 | Aeromexico with 20% | Extra Aeromexico |
|---|---|---|---|
| 10,000 | 16,000 | 19,200 | 3,200 |
| 25,000 | 40,000 | 48,000 | 8,000 |
| 40,000 | 64,000 | 76,800 | 12,800 |
| 50,000 | 80,000 | 96,000 | 16,000 |
| 75,000 | 120,000 | 144,000 | 24,000 |
| 100,000 | 160,000 | 192,000 | 32,000 |
| 150,000 | 240,000 | 288,000 | 48,000 |
| 250,000 | 400,000 | 480,000 | 80,000 |
Points to send for an Aeromexico award (20% tier)
| Aeromexico the award needs | MR to send (÷ 1.92, round up to 1,000) | Aeromexico those points become |
|---|---|---|
| 20,000 | 11,000 | 21,120 |
| 30,000 | 16,000 | 30,720 |
| 40,000 | 21,000 | 40,320 |
| 50,000 | 27,000 | 51,840 |
| 60,000 | 32,000 | 61,440 |
| 80,000 | 42,000 | 80,640 |
| 100,000 | 53,000 | 101,760 |
| 120,000 | 63,000 | 120,960 |
These rows are planning figures. Search Aeromexico Rewards for your flight, cabin, and dates. Award rates can run high, and the cash you still owe — fuel and carrier surcharges, plus taxes — is part of the price. A blog example is not inventory.
Why this is usually still a pass
Twenty percent is a real bump on a partner that already transfers above 1:1. It is still a weak reason to move Membership Rewards.
Coverage of this promo (Upgraded Points, One Mile at a Time, AwardWallet) lands in the same practical place: the ratio is better, and the program is the problem.
- Fuel and carrier surcharges run high. The mileage number on the award is not the cost of the ticket. A “cheap” Aeromexico award that still asks for a large cash co-pay can lose to paying cash, or to a partner with a sane surcharge.
- Cancellation and change fees are expensive. A speculative transfer plus a speculative hold is how people donate both the miles and the fee.
- Award rates can be high. More miles out of Amex does not help if the chart already asks for a pile of them.
Membership Rewards transfer to a long list of airlines. Aeromexico is one exit. It is rarely the best one unless the seat you want is actually there, priced, and the surcharge is a number you accept.
When a transfer can still make sense
Move points only when all of these are true:
- The award is on the screen. Specific flight, cabin, and date, with the Aeromexico Rewards price and the cash co-pay already visible. “We fly to Mexico next year” is not a booking.
- You see 1,920. Your Amex transfer screen shows 1,920 Aeromexico Rewards per 1,000 Membership Rewards, and the end time on that screen is still in the future.
- You have done the cash comparison today. Mileage price plus fuel surcharge, carrier surcharge, and taxes, against the cash fare you would actually buy.
- The amount is what the ticket needs. Use the table. Round up to the next 1,000 Membership Rewards. Do not round up to a round number because it feels tidy.
- You can book as soon as the miles arrive. Often that is immediate. Terms allow up to about three days. Do not transfer if you cannot tolerate a delay and the seat might disappear.
- These Membership Rewards are spare. You are not raiding a balance you need for Flying Blue, or another Amex partner with a real seat.
Clean yes: The award is priced, the surcharge is acceptable, your screen shows 1,920 per 1,000, and you are transferring only the Membership Rewards that finish that ticket. Transfer. Book. Stop.
When to leave the points at Amex
Leave the balance alone if any of these are true:
- Nothing is booked. Aeromexico can price awards high, and a parked balance does not hold a seat. The expensive version of this promo is moving 100,000 Membership Rewards because the banner ends, then paying a fat change fee when the trip moves.
- The surcharge eats the 20%. You like the mileage discount and hate the cash line. Pay cash, or book a program whose co-pay you can say out loud.
- You would be funding a maybe. A wide date range, a cabin you have not found, or a route you have not searched is not a redemption.
- You wanted a different October bonus. Same Membership Rewards balance, different door. The Amex to Flying Blue 25% transfer bonus runs through October 31 and is the airline comparison that actually shares this wallet. The Amex to Hilton Honors 30% transfer bonus is the hotel comparison, and it is usually a pass too. Neither bonus improves an Aeromexico transfer, and this 20% does not improve them.
- The end date on your screen has passed. AwardWallet’s October 30 and the October 31 date in Upgraded Points and One Mile at a Time are both published. Your transfer tool is the one that will accept or refuse the points.
Speed and mistakes
Plan on fast, allow about three days. AwardWallet describes transfers as often immediate, with terms that still permit up to about three days. If the Aeromexico balance does not update, wait. A second click is a second irreversible transfer.
Link the Aeromexico Rewards account to Amex before you need it. Name mismatch and linking delays are how people miss a seat while points sit in limbo. Transfers move in increments that are often cited as 1,000 Membership Rewards, inside a range often cited as 1,000 to 999,000. If your screen uses a different step or a different ceiling, the screen is right.
Other October bonuses do not touch this balance
October is loud on purpose. This 20% is one Amex exit. The rest of the month is mostly other banks.
- Flying Blue 25% — same Membership Rewards, through October 31. Covered in the Amex to Flying Blue transfer bonus. Price that seat before you decide Aeromexico is the one.
- Hilton Honors 30% — same Membership Rewards, a hotel stash, usually still a pass. Covered in the Amex to Hilton Honors transfer bonus.
- Capital One → British Airways Avios 20% — a different currency. Covered in the Capital One to British Airways Avios transfer bonus. It does not apply to Membership Rewards.
- Chase → Marriott Bonvoy 70% — Chase points, a hotel. Covered in the Chase to Marriott Bonvoy transfer bonus.
- Citi → Japan Airlines 30%, Citi → Avianca LifeMiles 25%, and Citi → Qatar Privilege Club up to 35% — ThankYou Points, not Amex. Covered in the Citi to Japan Airlines, Citi to LifeMiles, and Citi to Qatar Privilege Club pieces.
Move the currency the offer is actually attached to, toward an award you can already see.
The verdict
Treat the October 2026 Amex → Aeromexico Rewards bonus as a booking tool, not a strategy.
If your Amex screen shows 1,000 Membership Rewards → 1,920 Aeromexico Rewards, the end time on that screen is still ahead of you, and a specific award is priced where the mileage plus the surcharge beats cash, transfer only what the ticket needs. Then book.
For everyone else: skip it. High fuel and carrier surcharges, expensive cancellation and change fees, and award rates that can run high are the product. Twenty percent does not repeal them. Confirm whether your account ends October 30 or October 31, 2026, at 11:59 p.m. MT. Confirm the ratio. Confirm the award. Then move points — or don’t.
Find the flight. Read the surcharge. Then send exactly the Membership Rewards that ticket requires.
Before you earn the next Membership Rewards point toward an airline transfer, run your spending through the credit card rewards calculator.
See all active transfer bonuses →.
This article reflects Amex Membership Rewards → Aeromexico Rewards transfer bonus coverage for October 2026 (Upgraded Points, One Mile at a Time, AwardWallet). Standard ratio 1,000 Membership Rewards → 1,600 Aeromexico Rewards (1:1.6); with the 20% bonus, 1,000 Membership Rewards → 1,920 Aeromexico Rewards (1:1.92). Transfers are commonly described in 1,000-point increments, often in a range of 1,000 to 999,000 Membership Rewards — confirm the increment and any cap on your Amex transfer screen. AwardWallet reports the offer through October 30, 2026 at 11:59 p.m. MT; Upgraded Points and One Mile at a Time report October 31, 2026 at 11:59 p.m. MT. Those published end dates disagree. The end time on your Amex transfer screen controls the transfer. AwardWallet describes transfers as often immediate, with terms that allow up to about three days. Aeromexico Rewards is covered as a program with high fuel and carrier surcharges, expensive cancellation and change fees, and award rates that can run high — transfer only when a specific award is priced and ready to book. Award examples in this article are planning figures, not live inventory or a published chart. Transfers are one-way. Offers can end early.
