Under what condition can a student pilot solo?

A student pilot is allowed to solo only after receiving a proper endorsement from a flight instructor. This endorsement is a crucial step that confirms the instructor has evaluated the student's flying skills, knowledge, and readiness to operate an aircraft independently. The instructor must ensure that the student understands the responsibilities and limitations of solo flight and has demonstrated the ability to handle the aircraft safely.

While feeling ready, completing a specific number of hours flying, or having favorable weather conditions are all important factors that contribute to a student's overall preparation for solo flying, they do not override the legal requirement of having a signed endorsement from a certified flight instructor. Without this endorsement, a student pilot is not compliant with FAA regulations, which prioritize safety and proper training in aviation operations.