Koltsovo Airport (SVX/USSS) is the primary international airport serving Yekaterinburg, the fourth-largest city in Russia and the administrative center of Sverdlovsk Oblast. It is one of the busiest airports in Russia outside the Moscow aviation hub, handling millions of passengers annually. The airport serves as the main hub for Ural Airlines, one of Russia's largest carriers, and offers connections to numerous domestic and international destinations across Europe, Asia, and the Middle East. It underwent significant modernization in the 2000s and 2010s, including a major terminal expansion. Koltsovo is strategically located near the Ural Mountains region, making it an important transit point between European Russia and Siberia. The airport's infrastructure supports both passenger and cargo operations.