Airlines from Asia dominate a list of the top carriers for long-haul journeys, according to a ranking of airlines based on passenger satisfaction and performance data. The study by British company MoneySuperMarket analyzed information from multiple independent sources, including consumer publication Which? , customer reviews on TrustPilot and TripAdvisor, and airline ratings from AirlineQuality and Skytrax, to identify which carriers deliver the best overall experience on extended flight routes.