United is offering a bonus of up to 100% miles when purchasing their miles for a limited time through December 19, 2016. This is a “Mystery” bonus so you’ll need to sign into your account to see what bonus offer you have received. It is also a tiered bonus, so based on your personal offer you’ll only receive the maximum bonus if you purchase 20,000 or more miles.
If you happened to receive the 100% bonus offer and go all and purchase the maximum number of miles (100,000) that will ultimately get you 200,000 miles and will cost $3,762.50 USD with taxes included. That means you are purchasing miles at 1.88 cents per mile.
This is probably one of the better (if not best) purchase United points opportunities directly through United, IF you were targeted for the highest offer. I personally wouldn’t purchase miles speculatively at this rate, but if you have an upcoming flight you are looking to book it is definitely worth to see if purchasing miles is cheaper than paying the lowest available rate. Also, this could be a good way to top off the number of miles required for an award ticket. You can purchase miles here.
Note: This transaction is from points.com so you will not receive bonus miles if using a credit card that gives a bonus for travel/airline purchases.