Between Jan. 16 and March 21, Mileage Plan members can travel roundtrip for 15,000 miles. Save 5,000 miles off the regular 20,000-mile Mileage Plan coach saver award when you fly on Alaska Airlines or Horizon Air between San Francisco, Oakland, San Jose or Sacramento and any city served in Oregon, Idaho, Colorado or Canada. Travel must be booked online at http://www.alaskaair.com and completed by March 21. The 5,000-mile discount is not available Feb. 16-20.