United Airlines a week ago launched a new MileagePlus buy miles sale with up to 100% bonus. The offer ends tomorrow (February 25, 2021)., ,United Airlines has promotions monthly for buying miles, but they all max out at a 100% bonus or a 50% discount (the same offer because United usually limits the number of miles one can purchase per year, including any possible bonuses up to 175K).

,You can access and see your bonus on United’s website 
here.,,The cost of a mile under this offer is 1.88 cents each.,Does it make sense to purchase the United miles?,If you use them for international business or first-class tickets between expensive city pairs, the answer is likely yes.,United stopped publishing award charts last year but recently launched a website that featured award deals (read more 
here), and Star Alliance charts are now gone (read more 
here).,Conclusion,It can make sense to buy if you can redeem for an international premium cabin award, and you can always redeposit the miles (with or without a fee) if there are travel restrictions or bans in place or last-minute other changes.,Here are the terms and conditions of this offer:,

  • Promotional offer valid until 11:59 p.m. CT on February 25, 2021.

  • Bonus miles count toward the 175,000-mile annual limit per account.

  • You may purchase up to 175,000 miles per account per calendar year.

  • Bonus miles will generally be credited to the recipient’s MileagePlus account when the transaction is complete; provided that certain transactions may take up to 48 hours.

  • Bonuses will be calculated on a per transaction basis only.

  • The bonus amount applicable to a transaction is shown in the chart.

  • Transactions may not be aggregated to calculate the bonus.

  • The credit card used in the transaction will be billed immediately upon purchase.

  • Mileage rates and other fees and offer terms are subject to change.

  • Miles purchased are nonrefundable.

  • Purchased miles do not count toward MileagePlus Premier® status.

  • All MileagePlus Program rules and terms and conditions apply.

  • GST/HST is charged to Canadian residents.

  • Powered by Points to purchase United MileagePlus miles. Transaction will appear as ‘Points United Miles’.

  • Pricing is only available for purchases made through buymiles.mileageplus.com.