I believe you're looking for this

http://www.alaskaair.com/content/tra...ices-fees.aspx

There is a $15 ticketing fee for ticketing through the call center
There is a $25 partner fee for making a partner reservation

Then there are taxes and govt fees. These can be as low as $5 for domestic US ... to around $200 for international (especially if the UK is involved)

If you're flying BA, there are fuel surcharges to consider, which can add several hundred more dollars.
Changes made through the call center are $100, changes made online are $75