Alaska Airlines allows for one checked bag per passenger on domestic flights within the United States. Bags can weigh up to 50 pounds and be up to 62 linear inches in combined length, width, and height. For an additional fee, guests may check a second bag or bags that exceed standard size limits. If you have questions or need assistance related to Alaska Airlines Baggage Policy, you can visit the Airlines Pet Policy. Additionally, you can contact at 800-252-7522 or +1-844-902-4930 (OTA Skip-Waiting).