Northwest Airlines WorldPerks is kicking off the year with another lucrative partner promotion, this time focusing on select hotels. Enter “WorldPerks Mission for Miles,” a two-part offer.

Between Jan. 17 and May 15, members who register for the promotion will be entered automatically into the WorldPerks Mission for Miles Game with a chance to win 100,000 bonus miles through a sweepstakes, as well as the opportunity to play an instant-win trivia game, for a chance to win up to 1,500 miles a day in addition to hotel stays and other prizes.

The hotel promotion itself involves Northwest matching up to 100 percent of standard miles earned on multiple hotel stays when you have two or more hotel stays within the promotional period. Participating hotel partners include Hilton Hotels and Resorts, Marriott, InterContinental Hotels Group and Starwood Hotels & Resorts. The bonus miles are in addition to the standard miles earned from the participating WorldPerks hotel partners.

At the end of the promotion, Northwest will award the bonus miles based on the total number of hotel stays you’ve had. Two stays earn a 25-percent bonus – thus, a standard haul of 1,000 miles (two stays at 500 miles per stay) will actually pull in 1,250 total miles. Three stays earns a 50-percent bonus (for a total of 2,250 miles), and four stays, a 100-percent bonus (4,000 miles). And who among our road-warrior readership won’t have four stays in four months?

To register and play the game, visit http://www.nwa.com/promo/missionformiles and enter promotion code 8722.