United MileagePlus Shopping is offering big shopping portal bonuses at specific retailers through February 19, 2018 at 11:59 PM ET.

Through September 29, 2017 at 11:59 CT, United is offering up to a 75% bonus on purchased miles. The size of the bonus depends on the number of miles you buy, with the largest 75% bonus kicking in at 30,000 miles purchased. The minimum purchase is 2,000 miles, and purchases must be in increments of 1,000.

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

Bank of America issues an Asiana Visa Signature Card, and it comes with 30,000 Asiana miles after spending $3,000 on the card within three months of opening it.

Quick Facts

Sign Up Bonus: 30,000 Asiana miles after $3,000 in spending in the first three months
Category Bonuses:

3x on Asiana purchases
2x on gas station and grocery store purchases

$100 rebate on Asiana purchases annually
Cardmember anniversary retention bonuses: 10,000 Asiana Mile Bonus Certificate and two Asiana Lounge invitations
No foreign transaction fees
Annual Fee: $99

Credit card links have been removed from posts and

American Airlines is offering up to 100,000 bonus miles + a 10% discount when you purchase American Airlines miles through July 31, 2017. If you buy the largest amount possible, you can get them for as little as 1.72 cents each. That’s the cheapest I’ve ever seen American Airlines miles for sale (we also saw them on sale for 1.72 cents each this time last year).

Bonus miles are tiered based on how many miles you purchase.

American Airlines is offering up to 100,000 bonus miles + a 10% discount when you purchase American Airlines miles through June 30, 2017. If you buy the largest amount possible, you can get them for as little as 1.72 cents each. That’s the cheapest I’ve ever seen American Airlines miles for sale (we also saw them on sale for 1.72 cents each this time last year).

Bonus miles are tiered based on how many miles you purchase.

Through June 2, 2017 at 11:59 CT (today and tomorrow), United is offering up to a 67% bonus on purchased miles.

American Airlines is offering up to 115,000 bonus miles when you purchase American Airlines miles through April 13, 2017. You can now buy 265,000 American Airlines miles including bonus for $4,786.88 or 1.8 cents each.

Bonus miles are tiered based on how many miles you purchase. The best deal is to buy 150,000.

American Airlines miles cost 2.95 cents each plus a 7.5% excise tax, and every purchase has a $30 processing fee.

The Barclaycard AAdvantage Aviator Red World Elite MasterCard is out and it comes with a super easy sign up bonus. You'll earn 40,000 American Airlines miles after your very first purchase and paying the $95 annual fee, which is essentially buying 40,000 American Airlines miles for $95 (or .23 cents each).

Right now it's easy to earn a ton of American Airlines miles, thanks to this new offer and the personal and business Citi AAdvantage cards that are each publicly offering 60,000 American Airlines miles for spending $3k in three months.

The United shopping portal is offering 15 miles per dollar today only (until 11:59 PM ET on 1/22/17) at a number of stores that normally offer only 2-5 miles per dollar.

I value United miles at 1.6 cents each, so getting 15 miles per dollar on your purchase is like getting 24% of your purchase rebated back in United miles (in addition to the 1x or more you're getting on your credit card purchase normally.)

Here are the 15x stores:
More information on portals from my Free First Class Next Month series:

The process for earning miles from portals