International airlines from my experience I'd order like this of those I can recall flying with: Emirates (the best). Thai Airways Singapore Airlines Continental Malaysia Airlines Royal Nepal (bad...really bad).
Domestic airlines, I've only been on a few, so I'd order them: Continental America West Southwest None of them is really good thought...the top 3 international I've been on are easily better than any domestic.
I usually fly Alaska, but I do not fly often.