United MileagePlus has come out with another mystery buy miles bonus promotion. This time it is in a flash sale format only lasting four days. The bonus will be revealed to you after you login and can be as high as 100%. Personally I received 85% while others are receiving up to that 100% bonus. If you get the 100% bonus then it can be worthwhile to buy miles in this sale.
Receive up to 100% bonus when you buy MileagePlus Miles. Buy miles here. Until Jul 16, 20
The 85% bonus is broken down as follows:
- Buy 5,000 to 14,000 miles receive a 20% bonus
- Buy 15,000 to 34,000 miles receive a 50% bonus
- Buy 35,000+ miles receive a 85% bonus