To become a commercial airline pilot, you typically need to obtain both a Commercial Pilot License (CPL) and an Airline Transport Pilot License (ATPL). Here are the general steps to follow:
Obtain a Private Pilot License (PPL): The first step is to acquire a PPL, which involves meeting the requirements set by the aviation authority in your country. This typically includes a minimum age, medical certification, and a specified number of flight hours. 
Build Flight Experience: Accumulate flight hours and gain experience as a pilot. The specific flight hour requirements vary, but generally, you will need to log a significant number of flight hours, often ranging from 200 to 250 hours, before pursuing your CPL.
CPL Training: Enroll in a CPL training program at a reputable flight school or training institution. The CPL training will involve both theoretical knowledge and practical flight training, focusing on advanced aviation subjects, flight maneuvers, navigation, instrument flying, and commercial flight operations.
Pass CPL Exams: Successfully complete written exams that cover subjects such as aviation regulations, meteorology, navigation, aircraft systems, and flight planning. These exams assess your knowledge and understanding of commercial aviation principles. CPL Flight Test: Undergo a CPL flight test administered by an authorized examiner. The flight test evaluates your flying skills, decision-making abilities, and overall competence as a commercial pilot.
Upon passing the CPL flight test, you will be granted a CPL, which allows you to fly for compensation or hire.
Gain Flight Experience as a CPL: Build additional flight hours and gain experience as a CPL holder. Many pilots choose to work as flight instructors, charter pilots, or in other flying roles to accumulate the flight hours required for an ATPL.
ATPL Theory: Begin studying for the ATPL theory exams. The ATPL theory covers advanced aviation subjects in greater depth and includes topics such as air law, aircraft systems, flight planning, navigation, meteorology, and more.
ATPL Flight Training: Undergo flight training specific to the requirements of the ATPL. This training may involve advanced flight maneuvers, multi-crew operations, and simulator-based training to prepare you for the challenges of airline operations.
Pass ATPL Exams: Successfully complete the ATPL theory exams, which may be conducted by the aviation authority or an approved examination body. These exams assess your knowledge of advanced aviation theory and regulations.
ATPL Flight Test: Complete the ATPL flight test, which evaluates your skills, decision-making abilities, and proficiency in operating larger and more complex aircraft.
ATPL License: Upon successful completion of the ATPL exams and flight test, you will be granted an ATPL, allowing you to act as the pilot-in-command of multi-crew commercial aircraft.
Please note that the specific requirements and procedures may vary depending on the regulations and guidelines of the aviation authority in your country. It is essential to consult with local aviation authorities and experienced professionals for detailed guidance and country-specific requirements. Airman’s Ground can also help you in getting detailed consultation from industry experts from your country.
Embarking on the journey to become a commercial airline pilot requires dedication, commitment, and continuous learning. Always stay informed, seek guidance from industry professionals, and be prepared to work hard to achieve your dream of becoming a professional pilot.