London Stansted is indeed a very busy airport, currently serving as the third-busiest in London and the fourth-busiest in the United Kingdom overall. As of early 2026, it has achieved a historic milestone by surpassing 30 million annual passengers, driven largely by its role as the primary base for budget airlines like Ryanair. In January 2026 alone, it handled nearly 1.9 million travelers, reflecting a steady growth trend. While it is renowned for efficiency and has recently upgraded its security halls with next-generation CT scanners (allowing you to keep liquids in your bag), the terminal can feel exceptionally crowded during peak holiday periods and early morning "departure banks." Its popularity stems from its vast network of European and North African routes, making it a critical hub for both leisure and business travel within the UK aviation landscape.