<<Disclaimer: Verify this information before applying it to your situation.>>
I just booked a flight on Alaska Airlines through a travel agency
on the web, and learned only when I received my confirmation that they do
not offer special meals. Others travelling in the Pacific Northwest might
want to take note of this. They have a sister airline, Horizon Air. I
don't know if Horizon has the same policies, but I would inquire before
booking a flight with them as well.
Sydney from Seattle
P.S. I did send an email message to the airline telling them I was
posting this message and offering to post a correction if their policy
changes. If I hear anything of general interest, I will let you all know.