Copa Airlines, the flag carrier of Panama, is a major member of the Star Alliance, the world’s largest global airline network. In 2026, its most significant affiliation remains its long-standing partnership with United Airlines. This relationship began when Continental Airlines (which merged with United) purchased a stake in Copa, and it continues today through a comprehensive codeshare agreement and a shared frequent flyer platform. Copa uses United's MileagePlus as its loyalty program, meaning passengers can earn and redeem miles seamlessly across both airlines. Beyond United, Copa is affiliated with other Star Alliance giants like Lufthansa, Air Canada, and Avianca. Based out of the "Hub of the Americas" in Panama City, Copa leverages these affiliations to connect passengers from all over North America to over 80 destinations in Central and South America and the Caribbean, making it a critical "bridge" airline for international travel in the Western Hemisphere.