Shannon Airport is an international airport located in County Clare, Ireland. It serves as a key gateway for transatlantic flights and is known for its unique status as the first airport in the world to offer duty-free shopping. The airport is situated approximately 24 kilometers from Limerick and 22 kilometers from Ennis. Opened in 1945, Shannon Airport has a single runway and a modern terminal that accommodates both domestic and international flights. It plays a significant role in connecting Ireland to various destinations, particularly in North America and Europe, making it an important hub for travelers.