Amex Platinum offers for Sept. 1: Allegiant $50, Hilton Diamond trial, and 30% transfer bonus (2026)

The Sept. 1 check found three new or newly confirmed Hilton and travel opportunities for US Amex Platinum cardmembers. The fastest actions are checking for the targeted Hilton Diamond email and adding Allegiant before a qualifying booking charged by Sept. 30. The Hilton promotion that starts today is a Membership Rewards transfer bonus, so it sits outside the Amex Offers tab.

Quick comparison

Item	Benefit	Qualifying action	Cap or anchor	Expiry or trial period	Activation and eligibility
Allegiant Air Amex Offer	$50 statement credit	Spend $250 on qualifying Allegiant flight purchases	One-time $50 credit, or 20% back at the threshold	Pay by Sept. 30, 2026; travel can be later	Add to the targeted enrolled card before booking
Hilton Diamond trial	Diamond status immediately	Complete 10 qualifying nights during the trial	10-night trial target; no spend requirement disclosed	90-day trial; extension can run through Mar. 31, 2028	Targeted Hilton email with a unique code
Amex MR to Hilton bonus	30% more Hilton Honors points	Transfer Membership Rewards points to Hilton	1,000 MR becomes 2,600 Hilton points instead of 2,000	Sept. 1-Oct. 14, 2026	Confirm the bonus on the transfer screen before submitting
Accor US Amex Offer, carry-forward	$100 statement credit	Spend $500 on eligible room rate or room charges	One $100 credit, or 20% back at the threshold	Nov. 2, 2026	Add the limited-enrollment offer to the same card used for payment

New or newly confirmed

Allegiant: $50 back after $250

A targeted Allegiant Air Amex Offer pays a one-time $50 statement credit after $250 in one or more qualifying Allegiant flight purchases. The offer gives a 20% effective credit at the minimum spend, with a $50 maximum. Danny the Deal Guru published the terms on Aug. 28, including the booking deadline and exclusions. 1

The booking must be made directly with Allegiant at allegiantair.com, by phone, or at an Allegiant ticket counter. The flight must originate in the United States and the charge must be in US dollars. The Sept. 30 deadline applies to the payment date, so later travel can qualify when the booking is paid by that date. Allianz travel insurance, Trip Flex, merchandise, third-party bookings, resellers, travel agents, and non-USD purchases are excluded. 1

Add the offer to the specific targeted Platinum card before booking. The Points Guy lists the same $50-after-$250 terms and Sept. 30 expiry in its Aug. 28 travel-deals roundup. 2

Hilton: a targeted 90-day Diamond trial

Some Amex Platinum cardmembers received a targeted Hilton email with a unique registration code. The code activates Hilton Diamond status immediately for 90 days. Completing 10 qualifying nights during that trial extends Diamond status through March 31, 2028. Danny the Deal Guru published the offer details on Aug. 28. 3

The public offer page gives no general enrollment deadline. The email code and the Hilton account view control eligibility, so a Platinum cardmember should check both before planning stays. A Reddit discussion posted Aug. 26 includes a commenter who said the 10 nights should be booked directly through Hilton. That comment is useful as an account-level report, while the thread itself is not proof of a universal booking rule; the returned discussion also indicates that more comments remain upstream. 4

The trial has a clear value test: the 10-night target only helps when the stays fit a real Hilton itinerary during the 90-day window. Check the registration code first, then confirm which nights Hilton counts before committing to stays for status alone.

Hilton transfers: 30% more Membership Rewards points

American Express Membership Rewards is offering a 30% transfer bonus to Hilton Honors for US accounts from Sept. 1 through Oct. 14, 2026. The usual 1:2 ratio becomes 1:2.6, so 1,000 Membership Rewards points becomes 2,600 Hilton Honors points. One Mile at a Time reports the promotion and advises checking that the bonus appears before the transfer is submitted. 5

Frequent Miler's live transfer-bonus tracker also lists American Express Membership Rewards to Hilton with a Sept. 1 start and Oct. 14 end date. 6 This is a points promotion, not a statement-credit Amex Offer. Hilton points can provide less value than flexible Membership Rewards points, so check the exact Hilton award before transferring. The bonus does not make an otherwise weak redemption useful by itself.

Still live, but not new: Accor

The Accor US Amex Offer remains useful for an eligible stay, but the launch belongs to Aug. 4. The offer pays $100 back after at least $500 in eligible room-rate or room-charge spend, with one credit per eligible account, and runs through Nov. 2, 2026. Loyalty Lobby's Aug. 28 post reports a successful redemption; that post confirms an individual credit rather than a new launch. 7 8

Enrollment is limited, and the same enrolled card must pay the eligible charge. Book through all.accor.com, the ALL Accor app, or a participating property directly. Prepaid online reservations, third-party bookings, residences, gift cards, weddings and events, golf, spa, dining, retail, and nonparticipating Accor brands or properties are excluded. The $500 threshold applies in US dollars after foreign-currency conversion and covers room rate and room charges. 7

Dining check

No dated public source confirmed a new US Amex Platinum dining Amex Offer during Aug. 25-Sept. 1. The Aug. 28 live tracker snapshot includes a food-related 177milkstreet offer, while the item is not a restaurant dining offer. Amex Offer inventory is personalized, so the logged-in Offers tab remains the final account-level check. 9

Five-minute action list

Check the Hilton inbox and account for the Diamond trial code. Record the 90-day end date if the offer appears, then verify which 10 nights qualify before planning stays.
Open the Membership Rewards transfer page today and price a specific Hilton award. Transfer only after the 30% bonus appears, with Oct. 14 as the last published day.
Check the targeted Allegiant tile and add it before paying for at least $250 in qualifying direct Allegiant flight purchases by Sept. 30.
Check the Accor tile before booking. Confirm that the property participates, the payment is room-rate or room-charge spend, and the booking path avoids prepaid and third-party exclusions before Nov. 2.
Open the Amex Offers tab for a personal dining offer. Public sources supplied no dated confirmation this week, while account-level availability can differ.