The first one has almost 1000 airplanes, and the first 4 are all based in the United States of America.
- American Airlines (United States) has 965 airplanes, consisting of Airbus, Boeing, Embraer and McDonnell. Their largest hub is Dallas/Fort Worth airport (DFW).
- Delta Air Lines (United States) has 914 airplanes in its fleet, consisting of Airbus, Boeing, Embraer and McDonnell. Their main hub is Atlanta airport (ATL).
- United Airlines (United States) has 775 Airbus and Boeing airplanes. United’s main hub is Chicago–O’Hare airport (ORD).
- Southwest Airlines (United States) has 753 Boeing airplanes in its fleet. Southwest does not use the “hub and spoke” system of other major airlines, preferring the “point-to-point” system.
- China Southern Airlines (China) has a total of 613 Airbus, Boeing and Embraer airplanes. It maintains a strong presence in the domestic market with its main hubs at Beijing Capital International Airport (PEK) and Guangzhou Baiyun International Airport (CAN).
- China Eastern Airlines (China) has a fleet of 523 Airbus and Boeing airplanes. Its main hubs are at Shanghai Pudong International Airport (PVG) and Shanghai Hongqiao International Airport (SHA).
- Ryanair (Ireland) has an all-Boeing fleet of 421 airplanes. Its primary operational bases are at Dublin (DUB) and London Stansted (STN) airports.
*The above fleet sizes come from airfleets.net on July 10th 2019.