Giving ATPL aviation science lessons and explaining them in a simplified manner for easy understanding and comprehension The ATPL license is the highest level of civil aviation licenses. You must take the ATPL test to obtain the license. Here are its types: 1- Airline Transport Pilot ATPL License Once a pilot has accumulated 1,500 flight hours, they are eligible to earn an Airline Transport Pilot License (ATPL). This license allows pilots to fly large passenger aircraft and is required for airline work. However, some airlines will accept you without an ATPL, and you can obtain it once you have completed your hours on the job. 2- Frozen Air Transport Pilot License ATPL-F You are eligible to take the ATPL test even if you do not have 1,500 flight hours, but you will receive a frozen license that will be unfrozen when you reach 1,500 flight hours.