International airlines are companies that provide air travel services between different countries. They operate flights that connect major cities around the world, allowing passengers to travel long distances quickly and efficiently. These airlines often offer various classes of service, including economy, business, and first class, catering to different passenger needs and budgets. Many international airlines are part of global alliances, such as Star Alliance or Oneworld, which enable them to collaborate on routes and share benefits with other member airlines. This cooperation helps improve connectivity and offers travelers more options for flights and destinations, enhancing the overall travel experience.