Alaska Airlines has a missed flight policy that outlines the steps you should take if you miss your flight. Here are the main points:

If you miss your flight, you should contact Alaska Airlines as soon as possible to see what your options are. You can do this by calling their customer service line or visiting an airport ticket counter.

If you miss your flight due to circumstances beyond your control, such as a flight delay or cancellation, Alaska Airlines will usually try to accommodate you on the next available flight at no extra charge.

If you miss your flight due to your own fault, such as arriving late at the airport or not having the proper travel documents, Alaska Airlines may charge you a fee to change your reservation or rebook you on another flight.

If you miss your flight and have a non-refundable ticket, you will likely not be entitled to a refund. However, you may be able to use the value of your ticket towards a future flight by paying a change fee and any difference in fare.

It's important to note that Alaska Airlines' missed flight policy may vary depending on the type of ticket you purchased and the specific circumstances of your situation. It's always a good idea to read the terms and conditions of your ticket carefully and to contact Alaska Airlines as soon as possible if you miss your flight.
https://www.iairlineservice.com/blog/alaska-airlines-missed-flight-policy/