Get a 20% bonus on Starwood Preferred Guest conversions to American Airlines
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There are two good reasons why you may be considering building up some American Airlines miles at the moment:
The free UK credit card has a 15,000 mile sign-up bonus
AA still awards 100% of miles flown when you credit economy BA flights, compared to just 25% of miles flown if you credit to Avios
The pros and cons of collecting AA miles are discussed in the two articles I link to above.
If you did either of the above and wanted to top up your American Airlines miles, here is a good opportunity.
Between July 1st and August 7th, you will receive a 20% bonus on conversions of Starwood Preferred Guest (Sheraton, Westin, Le Meridien, W etc) hotel points to American Airlines.
This is on top of the 25% bonus that Starwood gives to any airline transfer of 20,000 points or more.
This means that, for example:
10,000 Starwood points will get you 10,000 American miles
20,000 Starwood points will get you 30,000 American miles
The bonus is valid for multiple transfers during the promotional period. No registration is required.
Full details can be found on the American Airlines website here.
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How to earn Marriott Bonvoy points and status from UK credit cards (June 2025)
There are various ways of earning Marriott Bonvoy points from UK credit cards. Many cards also have generous sign-up bonuses.
The official Marriott Bonvoy American Express Card comes with 20,000 points for signing up, 2 points for every £1 you spend and 15 elite night credits per year.
SPECIAL OFFER: Until 15th July 2025, the sign-up bonus on the Marriott Bonvoy American Express Card is TRIPLED to 60,000 Marriott Bonvoy points. This would convert into 25,000 Avios or into 40 other airline schemes. It would also get you at least £300 of Marriott hotel stays based on our 0.5p per point low-end valuation. Other T&C apply and remain unchanged. Click here for our full card review and click here to apply.
You can apply here.

Marriott Bonvoy American Express Card
60,000 points (to 15th July) and 15 elite night credits each year Read our full review
You can also earn Marriott Bonvoy points by converting American Express Membership Rewards points at the rate of 2:3.
Do you know that holders of The Platinum Card from American Express receive FREE Marriott Bonvoy Gold status for as long as they hold the card? It also comes with Hilton Honors Gold, Radisson Rewards Premium and MeliaRewards Gold status.
We reviewed The Platinum Card from American Express in detail here and you can apply here.

The Platinum Card from American Express
50,000 bonus points and great travel benefits – for a large fee Read our full review
You can also earn Marriott Bonvoy points indirectly:
- American Express Preferred Rewards Gold Credit Card (20,000 bonus Amex points)
- The American Express Rewards Credit Card (10,000 bonus Amex points)
and for small business owners:
- The American Express Business Gold Card (20,000 bonus Amex points)
- The American Express Business Platinum Card (50,000 bonus Amex points)
The conversion rate from American Express to Marriott Bonvoy points is 2:3.
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