Until April 25, United is offering Mileage Plus members the opportunity to top off their account balances with a fairly attractive miles sale.   The sale is tiered, so the more miles you buy, the greater your discount.

Purchasing between 5000 and 9000 miles will earn you a 20% mileage bonus (3.1 Cents Per Mile including taxes).

Purchasing between 10000 and 19000 miles will earn you a 40% mileage bonus (2.8 Cents Per Mile including taxes).

Purchasing between 20000 and 80000 miles will earn you an 80% mileage bonus (2.1 Cents Per Mile including taxes).

As you can see, the best option is at the 20,000+ mile purchase level.   The deal is not necessarily the best that’s ever existed but if you are short a few miles for that Lufthansa First Class ticket, this kind of a sale is an economical way to fill the gap.

You can buy up to 80,000 miles (plus the 80% bonus) with this specific sale with an annual limit of 150,000 miles that can be purchased.

Miles do not count towards status level, they are strictly award miles.