How early can I check-in for Alaska Airlines?

Alaska Airlines domestic travelers can check in anytime from 1 to 24 hours before your flight. Checking bags? Easily pay your checked baggage charges online with a credit or debit card, then bring them to the baggage-check location. Additional Alaska Web Check In Details like recommended minimum check-in times, baggage procedures, and first-class exceptions can be retrieved by contacting Alaska customer service at 800-252-7522 or 1-844-902-4930 (OTA Skip-Waiting) or checking out a blog on the Airlines Pet Policy.