The Citi® / AAdvantage® Executive World Elite™ MasterCard®

I get questions all the time like this:
Hi, I have a million American Express Membership Rewards/Chase Ultimate Rewards/Citi ThankYou Points, what is the best transfer partner to go from [here] to [there.]
There are basically two ways to answer the question:

Look at award charts of all the points' transfer partners and then look for award space using the cheapest miles. I used this method to suggest to my friend that he transfer his Membership Rewards to Flying Blue miles to get from Denver to Tel Aviv.

Through Friday (June 3, 2016), you can buy IHG Rewards Club points with a 100% bonus.

The Alaska Airlines card from Bank of America now offers 30,000 bonus Alaska miles after you spend $1,000 on purchases in your first 90 days from account opening.

The previous public offer had been 25,000 miles for a long time with frequent 30,000 mile offers and an occasional 40,000 mile offer, but Alaska Airlines announced its plan to go to a 30,000 mile bonus this spring in a February stock market filing.
Quick Facts

Sign Up Bonus: 30,000 Alaska miles after $1,000 in spending in the first 90 days
Category Bonuses: 3

I was almost the star of a Quilmes Copa America commercial in Argentina. Quilmes is the biggest beer brand in Argentina.

The American Airlines eShopping portal is offering 50 miles per dollar spent at magazines.com through today (May 27, 2016.)

Portals are a way to earn extra miles. You start your online shopping at a portal, click a link that adds cookies to your browser to prove you started in the portal, and then purchase things on other sites at normal price while getting bonus miles.

Portals generally offer small miles per dollar at stores that have small margins. For instance, you can get 1 bonus mile per dollar at walmart.com through the American Airlines portal.

I tweeted this deal first from @MileValueAlerts. Follow @MileValueAlerts on Twitter and follow these directions to get a text message every time I tweet from that account. I tweet from @MileValueAlerts only a few times a month because it is designed to be used only for the best and most limited-time deals–like mistake fares–so that you aren’t bombarded by text messages.

Travel from Chicago, Houston, Miami, Fort Lauderdale, Washington DC, and Los Angeles roundtrip to Panama City; Lima, Peru; or Cuzco, Peru for $313+ roundtrip in Avianca Business Class.

Through tomorrow (May 26, 2015), British Airways is offering a 40% bonus on the purchase of Avios. The biggest bonus ever offered on the purchase of Avios was 50% in February 2015, so this is a big bonus.

The maximum Avios you can purchase in a year is normally 35,000, but is being raised to 100,000 during this promotion. With a 40% bonus, that means you can add 140,000 Avios to your account.

Update 5/25/16: A One Mile at a Time commenter confirms booking a Brussels Business Class roundtrip from New York to Brussels for 36,620 Etihad miles plus under $100 in taxes per person.

Through Friday (May 27, 2016) at 11:59 CT, United is offering a 100% bonus on purchased miles. The size of the bonus depends on the number of miles you buy, with the largest 100% bonus kicking in at 40,000 miles purchased.

United miles normally cost 3.5 cents per mile plus a 7.5% tax, bringing the full price to 3.76 cents each.