From now until Sept. 1, Northwest WorldPerks members can redeem 20,000 miles for travel on selected routes operated by Alaska Airlines. Normally, these awards would cost you 25,000 miles, but for a limited time, WorldPerks is offering its members a discount of 5,000 miles. Members can redeem 20,000 miles for travel between Seattle and Calgary, Sun Valley (Idaho), Billings, Bozeman, Butte, Great Falls, Helena, Kalispell or Missoula (Mt.).

If you want to stay out of the rain, you can also redeem 20,000 miles for travel between Portland, Ore. and Billings, Bozeman, Butte, Great Falls, Helena, Kalispell, or Missoula.

Before you get too excited, remember there are some rules to follow. Miles redeemed for a single award can only be deducted from a single WorldPerks account. This offer is valid for coach-class travel only, so you will have to sit among the working population. All travel must be on Alaska Airlines or Horizon Air operated flights. To book a flight, call 1-800-444-PERKS.