From Associated Press:

SEATTLE — Alaska Airlines said Wednesday that members of its Mileage frequent-filer plan will be able to earn double miles on the carrier's nonstop flights between Anchorage, Alaska and Los Angeles and Denver.

The airline is hoping that by offering more miles it can entice travelers to visit Alaska during the state's summer tourist season.

"Summer is the perfect time to visit the great state of Alaska and with this offer our customers in Los Angeles and Denver can 'double down' to earn twice the miles for their flights," said Rick Rasmussen, director of customer loyalty and marketing programs.

The promotion for flights between Anchorage and Los Angeles begins on May 23, while the promotion for flights to and from Denver begins June 5. In both cases, the flights must take place on or before Sept. 6.