The Alaska Airlines missed flight policy (https://mikoflight.com/blog/what-happens-if-missed-alaska-flight.php) is generally strict. If you miss your original flight without notifying the airline beforehand, the entire remaining itinerary may be canceled (No-Show). However, if you contact them quickly, the airline often allows passengers to fly standby on the next available flight, potentially incurring a fee or fare difference based on the ticket rules.