Top-10 of the best airlines of the world in 2019 that should be expected in 2020?

What of airlines the best? Why in top-20 any of air carriers of United States of America did not enter? It is published some various lists of the best airlines of the world, the most authoritative of them – the Skytrax list. The rating of Skytrax includes not only indicators of convenience of chairs, are estimated also food, service, crew...