How do I upgrade my seat on Alaska Airlines? Many passengers don't know how to upgrade seats on Alaska Airline. If you are one of them and want to upgrade your seat, Alaska Airlines allows you to change your seat at any time. But first, you must know the Alaska Airline seat selection policy. From this article, you can learn the process to upgrade seats on Alaska Airlines. https://www.quickcaribbean.com/blog/alaska-airlines-seat-upgrade