From Smarter Travel, "What makes a 'best' airline for a long flight? For most travelers it's the amount of room you get—and some airlines give more than others."
FWIW, no US airline makes the list...
http://www.smartertravel.com/photo-galleries/editorial/best-airlines-for-long-haul-flights-in-economy.html?id=377&source=21068
Best Airlines for Long-Haul Flights in Economy
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Thanks for posting -- really interesting, both this one and the related links.
Thanks!! Very interesting.
Suffice it to say that there is a lot of nuance to the "best" airline that is missed by this analysis.