美国联合航空公司（United Airlines）推出购买里程闪电促销活动，通过 MileagePlus 官网购买里程，可获额外 100% 奖励，相当于买一送一。我们知道，美联航基本上每个月都有里程促销活动，100% 奖励或者五折优惠就是最低价，所以别错过这次买一送一促销活动。活动只剩下两天多时间了，买分需抓紧。
这里再说一下，100% 奖励和五折优惠其实是一样的促销。因为美联航限定每名会员每年最多只能购买 15 万里数，包含奖励的部分。
促销网址：https://buymiles.mileageplus.com/united/united_landing_page/
促销时间：即日起 至 2018 年 7 月 26 日（约北京时间 7 月 27 日 13:00 左右）
促销介绍：
Perfect if you are just a few thousand miles short of your next award trip. You can apply these miles toward award travel on United® or any MileagePlus airline partner, or toward upgrades on United.
Buy miles and get up to 100% bonus miles with your purchase for a limited time.
Buy 5,000 - 14,000 miles | Get a 30% bonus
Buy 15,000 - 29,000 miles | Get a 70% bonus
Buy 30,000 - 75,000 miles | Get a 100% bonus
成本分析：
购买里程从 2,000 里程起卖。
购买 5,000 - 14,000 里程奖励 30% 。
购买 15,000 - 29,000 里程奖励 70% 。
购买 30,000 - 75,000 里程奖励 100% 。
您每年可以最多购买 150,000 里程，要注意的是，这个 15 万里程的购买限制是包括奖励的部分，也就是您购买里程后实际到账的里数。
您可以最多购买：75,000 + 奖励 75,000 = 150,000 里程，
价格是 $2,625 + 税 $196.88 = $2,821.88 美元，
成本：$2,821.88 美元 ÷ 150,000 里程 × 1000 = $18.81 美元/千里 ≈ ￥128.1 人民币/千里。
HotelDig 提醒您：
- 购买积分需使用信用卡支付，而且是立即扣款，不设退款，积分 48 小时内到账。
- 购买的积分不能用于 MileagePlus 会员等级的保级或升级。
- 购买美联航积分实际上是通过合作伙伴 Points.com 提供服务的，关于 Points.com 的介绍可以参考这篇文章：常旅客购买酒店积分或者航空里程的专门网站 Points.com 介绍。
促销条款：
- Promotional offer valid until 11:59 p.m. CT on July 26, 2018.
- Miles are available in increments of 1,000 up to a maximum of 75,000 miles.
- 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.
- 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.
- Bonus miles count towards the 150,000 mile annual limit per account.
- Purchase up to 150,000 miles per account per calendar year.
- Credit card will be billed immediately upon purchase.
- Mileage rates and other fees and offer terms are subject to change.
- Pricing is only available for purchases made through buymiles.mileageplus.com
- Miles 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'.
