The following policies are for passengers traveling in economy class, and are not top tier frequent flyer members for flights on the airline:
Free Baggage Allowance - Your first checked in bag is $20, your second is $20, with a weight allowance of 50lbs (23kg) per bag, and an additional 40lbs maximum of carry on luggage.
If flying to or from Guadalajara or Mexico City you may check two pieces of luggage for free.
Excess baggage fees for extra/oversized/overweight luggage start at $25 to $150. If it weighs over 100lbs it will not be accepted and you will need to contact cargo for freight charges.
Alaska Airlines policies regarding checking strollers, car seats, mobility devices and sports equipment.