Yes, you can stay overnight in Dublin Airport as it is a 24-hour facility; however, your experience will vary depending on where you set up. For those on a budget, there are designated "rest zones," particularly in Terminal 1, equipped with more comfortable seating. Many travelers choose to rest in the cafes or near the Oak Café Bar in Terminal 2, which offers cushioned chairs that are popular for napping. For a more structured sleep, Dublin Airport features sleep pods (usually found airside) that can be booked for a few hours. If comfort is a priority, there are several hotels within walking distance or a short shuttle ride away, such as the Maldron Hotel and the Radisson Blu. Keep in mind that security may ask to see a boarding pass for an early morning flight if you are sleeping in certain areas, and they may wake you up early as the morning rush begins around 4:00 AM. It is always wise to keep your valuables secured and stay in well-lit areas near other travelers.