Yes, you can generally bring a banana on a flight, but the rules change depending on whether your trip is domestic or international. For domestic flights (e.g., within the US or India), solid fruits like bananas are perfectly fine in both carry-on and checked luggage. However, for international flights, most countries have strict agricultural regulations to prevent the spread of invasive pests. When arriving in a new country, you must usually eat the banana before landing or declare it at customs. Failing to declare fresh fruit can lead to stiff fines, sometimes exceeding $300 or several thousand rupees, and the fruit will be confiscated. If the banana is part of a sealed, processed snack (like dried banana chips), it is much more likely to be permitted through international borders without issue.