In economy? Whatever airline has the best price and schedule and is in your preferred alliance. They really aren't that different.
Best in what way? Price? Service? Time? Are ff miles a factor? American Express site shows Turkish and Aeroflot as the two cheapest, followed by KLM and then Air France/Delta, using an arbitrary date. I'd personally not consider Aeroflot.Edited: 20 August 2014, 19:33
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