Commercial airlines are companies that provide air transportation services to passengers and cargo. They operate scheduled flights on specific routes, connecting cities and countries around the world. These airlines use large aircraft, such as those manufactured by Boeing and Airbus, to accommodate hundreds of travelers at a time. Passengers can book tickets through airline websites, travel agencies, or third-party platforms. Commercial airlines offer various classes of service, including economy, business, and first class, each with different levels of comfort and amenities. Safety regulations and standards are strictly enforced to ensure the well-being of all travelers.