Best Overall Airline in the World1. Singapore Airlines2. United Airlines3. Delta Air Lines4. Emirates5. Etihad Airways Best Airline Alliance1. oneworld2. Star Alliance3. SkyTeam Best Aircraft Type1. Airbus A3502. Boeing 7773. Boeing 7874. Airbus A3305. Airbus A320 Best Airline for Business Class1. Turkish Airlines2. Singapore Airlines3. United Airlines4. Cathay Pacific Airways5. Korean Air Best Airline for…