F
fairis
Guest
No, Alaska Airlines miles don’t expire as long as your account shows some activity at least once every 24 months. It doesn’t have to be anything big—you can earn a few miles from a partner, redeem a small amount, or even donate miles. I’ve had long gaps between trips, and a simple partner earn kept my balance active. The key is just making sure something posts to your Mileage Plan account within that two-year window.