1. United Airlines’ rise to the top. While American Airlines can still boast that its fleet number is the biggest in the world, United Airlines has managed to offer slightly more capacity in Q1 2023. This made it the largest carrier in the US in terms of offered capacity in Q1 2023. Singapore Airlines comes in second place for the largest number of A380s. Although it is just one down from Emirates on our list, its fleet of 17 quadjets pales in comparison to Emirates' 121. Sadly, just five of these 17 aircraft are currently operational- a paltry 29%. The remainder sit parked, waiting out ongoing travel restrictions. Southwest . The world's largest low-cost carrier also came about through a series of mergers. Southwest, currently with a fleet size of 734 Boeing 737s, acquired David Neeleman alumni Morris Air for over $120 million in stock in 1993 after only one year of the latter being active. airline alliance is when two or more make an to work with each other. The three largest airline alliances are , , and . Airline alliances make it easier for passengers to travel around the world, reducing their stops or connections. The biggest alliance is Star Alliance, which has 28 member airlines such as United Lufthansa, and Air Canada. Korean Air’s headquarter is in 260 Hanuel-gil, Gangseo-gu, Seoul, Korea 157-712. Its areas of business are passenger, cargo, aerospace, catering, and in-flights sales. Korean Air company owns 153 aircrafts and operates scheduled flights to 128 cities in 45 countries around the world, including 12 cities in Korea. With nearly 100 years of aviation history, Delta Air Lines has grown to become the world’s largest airline in terms of both revenue and market cap. As of March 2021, Delta’s first-quarter revenue for the year came in at $3.6 billion which, although is 65% lower than March 2019, shows significant positive growth from 2020. World’s Top 15 Biggest Airlines By Revenue Passenger Kilometers (RPK) Revenue passenger kilometers are a commonly used figure to assess the size of an airline. That’s why we chose this metric to rank the world’s biggest airlines. To assess the current airlines’ size, we analyzed RPK’s of November 2020, December 2020, and January 2021. As of July 2019, American Airlines has 996 aircraft in its fleet, comfortably besting Delta with 919 aircraft and United with 784 aircraft. So at least measured by fleet size, American Airlines remains the biggest airline in the world. Measured by fleet size, American is still the world's biggest airline. Photo: American Airlines. gZAtyS.

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