t's great that you're thinking about when to start training to become a commercial airline pilot. If you're asking When can I start training to become a commercial airline pilot the answer is: as soon as you fulfil certain eligibility conditions you can enrol in training. The earlier you plan this the better position you'll be in to pursue your dream.
To begin training to become a commercial airline pilot (i.e. someone who flies aircraft for pay or for an airline) you must meet a few key requirements:
Education: Typically you need to have passed the 12th standard or equivalent exam often in the Science stream with Physics Chemistry and Mathematics (PCM). This is a common requirement in India.
Age: You should be at least the minimum age required by your country's aviation regulator to begin flight training.
Medical fitness: You must obtain a Class 1 (or equivalent) medical certificate which verifies you're physically and mentally fit to fly commercially.
Language & regulations: You'll need to meet the language proficiency (usually English) and regulatory ground class requirements covering subjects like Air Regulations Navigation Meteorology etc. Once you have these in place you can enrol in a training programme that leads to the commercial pilot licence or equivalent.
By starting training early right after you finish your schooling and once you secure your medical certificate you gain several advantages:
You build flight hours and experience sooner which is crucial because commercial-airline pilot roles often require substantial flying time.
You get accustomed to aviation theory and practical flying when you are younger, which helps with skill development and adaptation.
The aviation industry tends to value pilots who have progressed through training steadily and have solid foundational knowledge.
So, you can start training to become a commercial airline pilot as soon as you've completed your schooling (with the required subjects) obtained your medical certificate and satisfied your country's minimum age/eligibility rules. Starting sooner gives you more runway (so to speak!) to achieve the licence and build the experience required for airline employment. With focused effort and meeting all the criteria you'll be well on your way to a career as a commercial airline pilot!