Mokulele Airlines said passengers on its flights can earn frequent-flier miles on Alaska Airlines when they fly interisland.

The air carrier said mileage plan members will earn 500 miles for each segment flown on Mokulele beginning on Dec. 15. Award redemption on Mokulele will be available in early 2009.

The frequent-flier partners said they will launch the new effort by offering double miles — 1,000 miles per segment — on Mokulele from Jan. 1 through Feb. 28.