International routes refer to the pathways that connect different countries through various modes of transportation, such as air, sea, and land. These routes facilitate the movement of people, goods, and services across borders, promoting global trade and tourism. Airlines, shipping companies, and transportation networks often establish these routes to enhance connectivity between nations. In the context of air travel, international routes are typically managed by airlines like Delta Air Lines or British Airways, which operate flights between major cities worldwide. These routes are subject to regulations and agreements between countries, ensuring safety and efficiency in international travel.