. . . "Skytrax" . "best international transit airport" . . "four- and five-star airlines" . "cleanest airport" . "Skytrax Airport and Airline Awards" . "cleanest airports" . "Skytrax" . "Skytrax, World Airlines Awards" . "SkyTrax" . "Skytrax, World Airport Award" . "international transit airport" . . "5-star airline" .