United Mileage Plus X currently has another 10x point promotion going on. Though not as encompassing as last year’s Black Friday offer, if you happen to shop Old Navy, GAP, or Banana Republic, you can easily rack up thousands of miles with this in one purchase. I could not find an expiration date, so I do suggest urgency, as this is a limited time offer.
Remember, miles earned with the app post instantly into your United Airlines frequent flyer account. The app is entirely free and even allows you to earn credit card bonus points in addition to United Airlines miles.