Which hub serves as Ryanair's largest operation in terms of passenger numbers?

Dublin Airport is indeed Ryanair's largest operation in terms of passenger numbers. The airline has a strong presence in Ireland, where it was founded, and Dublin serves as a significant base for its operations, connecting a wide range of European destinations. The strategic location of Dublin Airport, combined with Ryanair's extensive route network and competitive pricing, attracts a substantial number of travelers, making it the most important hub for the airline.

In comparison, while other airports like Heathrow, Frankfurt, and Madrid Barajas are notable airports in Europe, they do not serve as major hubs for Ryanair. These airports typically cater to larger, full-service airlines rather than low-cost carriers like Ryanair. As a result, their passenger numbers for Ryanair specifically do not reach the levels seen at Dublin Airport.