Budget airlines Frontier and Spirit to merge in $6.6 billion deal that could create the US' 5th largest airline. However, in April, JetBlue Airways threw a wrench in Frontier's plans. JetBlue's Check and compare the World's Best 100 Airlines for 2019 voted for by airline customers around the world. View the 2019 World Airline Rankings. The Top 100 Airline results can only be reproduced with the prior agreement of Skytrax. 1. Moving to an Airbus aircraft, American Airlines has an Airbus A321 in a special livery. Painted in the "US Airways Heritage" livery, the A321 recalls the most recent merger that helped make American Airlines the largest airline in the world and brought the carrier's current CEO to the airline. N578UW sports this livery. LTD. CATHAY PACIFIC AIRWAYS LTD. KOREAN AIR LINES CO.,LTD. ALL NIPPON AIRWAYS CO., LTD. THAI AIRWAYS INT’L PUBLIC CO.,LTD. TURKISH AIRLINES INC. ROYAL NEPAL AIRLINES CORP. AHK AIR HONG KONG LTD. POLAR AIR CARGO INC. .

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