United Airlines has pretty simple holiday online mall shopping bonus. You need to have cumulative spend of at least $250 between 11/18-12/31 to be eligible for 1000 bonus miles. This is in addition to the miles you earn from actual purchase(s). Apparently, there is even no need to register for this.
You can visit United’s online shopping mall at https://www.mileageplusshopping.com/promo____.htm.
The terms and conditions of this offer:
*All MileagePlus program rules apply. Double miles offers and elevated offers from select merchants are valid through 12/31/11. Qualifying MileagePlus Shopping purchases will accrue miles per the terms and conditions set by each particular merchant. Members should read each mileage offer carefully as certain exclusions may apply. Miles are awarded as reported by the applicable merchant (“Merchant”) to MileagePlus from Cartera Commerce, and certain exclusions may apply. Member must shop online with a valid MileagePlus number through MileagePlus Shopping to be eligible for the promotional offers.
The 1,000 bonus award mile offer is valid from 11/18 -12/31/11. To qualify for the 1,000 bonus award miles, a cumulative spend of $250 with participating MileagePlus Shopping online retailers during the time of the promotion is required. The maximum number of bonus miles that can be awarded to each qualifying member through this promotion is 1,000 bonus miles. The bonus award miles will post to your Mileage Plus account within 8 to 10 weeks after the promotion end date.