<P> The world's largest airlines can be defined in several ways . American Airlines Group is the largest by its fleet size, revenue, profit, passengers carried and revenue passenger mile . Delta Air Lines is the largest by assets value and market capitalization . Lufthansa Group is the largest by number of employees, FedEx Express by freight tonne - kilometers, Ryanair by number of international passengers carried and Turkish Airlines by number of countries served . </P> <Table> Forbes' World's Biggest Public Companies <Tr> <Th> Rank </Th> <Th> Airline </Th> <Th> Country </Th> <Th> Revenue (US $B) </Th> <Th> Profit (US $B) </Th> <Th> Assets (US $B) </Th> <Th> Market cap . (US $B) </Th> <Th> Employees </Th> </Tr> <Tr> <Th> </Th> <Td> American Airlines Group </Td> <Td> United States </Td> <Td> 40.99 </Td> <Td> 7.61 </Td> <Td> 48.41 </Td> <Td> 22.1 </Td> <Td> 118,500 </Td> </Tr> <Tr> <Th> </Th> <Td> Delta Air Lines </Td> <Td> United States </Td> <Td> 40.5 </Td> <Td> 4.7 </Td> <Td> 53.3 </Td> <Td> 34.4 </Td> <Td> 80,000 </Td> </Tr> <Tr> <Th> </Th> <Td> United Continental Holdings </Td> <Td> United States </Td> <Td> 37.5 </Td> <Td> 7.1 </Td> <Td> 40.9 </Td> <Td> 17.1 </Td> <Td> 83,000 </Td> </Tr> <Tr> <Th> </Th> <Td> Lufthansa Group </Td> <Td> Germany Switzerland Austria Belgium </Td> <Td> 35.5 </Td> <Td> 1.9 </Td> <Td> 36.3 </Td> <Td> 7.3 </Td> <Td> 120,652 </Td> </Tr> <Tr> <Th> 5 </Th> <Td> Air France - KLM </Td> <Td> France Netherlands </Td> <Td> 28.9 </Td> <Td> 0.131 </Td> <Td> 25.3 </Td> <Td> 2.7 </Td> <Td> 96,417 </Td> </Tr> <Tr> <Th> 6 </Th> <Td> International Airlines Group </Td> <Td> United Kingdom Spain </Td> <Td> 25.3 </Td> <Td> 1.7 </Td> <Td> 30.7 </Td> <Td> 15.4 </Td> <Td> 60,862 </Td> </Tr> <Tr> <Th> 7 </Th> <Td> Southwest Airlines </Td> <Td> United States </Td> <Td> 20.2 </Td> <Td> </Td> <Td> 22.2 </Td> <Td> 30.2 </Td> <Td> 49,600 </Td> </Tr> <Tr> <Th> 8 </Th> <Td> China Southern Airlines </Td> <Td> China </Td> <Td> 17.7 </Td> <Td> 0.620 </Td> <Td> 28.7 </Td> <Td> 8.4 </Td> <Td> 87,202 </Td> </Tr> <Tr> <Th> 9 </Th> <Td> China Eastern Airlines </Td> <Td> China </Td> <Td> 14.9 </Td> <Td> 0.730 </Td> <Td> 30.1 </Td> <Td> 10.9 </Td> <Td> 71,033 </Td> </Tr> <Tr> <Th> 10 </Th> <Td> All Nippon Airways </Td> <Td> Japan </Td> <Td> 14.7 </Td> <Td> 0.497 </Td> <Td> 19.1 </Td> <Td> 9.9 </Td> <Td> 33,719 </Td> </Tr> </Table>

Who has the most aircraft in the world