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.
How to earn Marriott Bonvoy points and status from UK credit cards (December 2021)
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 usually comes with 20,000 points for signing up, 2 points for every £1 you spend and 15 elite night credits per year.
You can apply here.

Marriott Bonvoy American Express
20,000 points sign-up bonus and 15 elite night credits 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 Gold and MeliaRewards Gold status. We reviewed American Express Platinum in detail here and you can apply here.

The Platinum Card from American Express
30,000 points and an unbeatable set of travel benefits – for a fee Read our full review
You can also earn American Express Membership Rewards points with American Express Gold (20,000 bonus points), the American Express Rewards Credit Card (5,000 bonus points) and – for small business owners – American Express Business Gold (20,000 bonus points) and Business Platinum (40,000 bonus points).
(Want to earn more hotel points? Click here to see our complete list of promotions from the major hotel chains or use the ‘Hotel Offers’ link in the menu bar at the top of the page.)
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