Size limit is 62 linear inches: H+L+D=62"
Excess bag = $50.00 (1-3) $75.00 (4-6) $150.00 (7+)
Oversize = $50.00
Overweight 51-70 pounds = $25.00
Overweight 70-100 pounds = $50.00
Overweight 100+ pounds = cargo if known shipper.
Sports equipment: generally is free (if part of two bag limit) unless it exceeds the weight or dimensions - most bikes exceed this size limit.
Fees are not combined. You won't be charged for both excess and overweight and oversize.
Domestic rules. International depends on other airline rules. Find more information at
www.alaskaair.com under contract of carriage.
FWIW - you can check three bags free (within weight/size restrictions) if the third bag meets the carry on rule size and you don't have a carry on after you check the third bag.
You can only use miles if you want to upgrade your bike to first class.
[This message has been edited by travelalot5 (edited 11-06-2003).]