Via OMaaT, there are two current promotions that, when stacked, allow you to purchase United MileagePlus miles for 1.185 cents per point, with a limit of 32,500 miles per account.
The steps are as follows:
- Buy up to 50,000 Choice Privileges points (Direct Link).
- Register for the United promotion (Direct Link).
- Go back to Choice once you have your points and perform the transfer (Direct Link).
Note that the Choice promotion ends on 11:59 PM ET November 17, 2017, and the points could take up to 24 hours to post to your account. Additionally, the United promotion ends on November 30, 2017, and the Choice to United transfer may take up to 5 business days. That means a point transfer initiated as late as November 24, 2017 should work, but I would do it earlier if possible to be on the safe side.
For what it’s worth, I purchased Choice points for both myself and my wife to transfer to our United accounts. We each have about 100,000 United miles, which typically isn’t enough for the types of awards we book, meaning that we would likely have to top off our accounts with Chase UR before redeeming for anything. With that in mind, I thought it was worth paying 1.185 cents/point now to save Chase UR at a future date.