T2 is linked to Terminal 1 both landside and airside. This means that if you're a transfer passenger, you can get to your boarding gates quickly and without a fuss. As the anchor tenant, Aer Lingus occupies 28 check-in desks in the west-end of the check-in building.

Yes, Dublin Airport’s Terminal 1 and Terminal 2 are connected landside (before security).

You can walk between the two terminals via a covered walkway, which takes about 5-10 minutes. The walkway is located at the Departures/Check-in level and is well-signposted.

Here’s what you need to know:

Key Points:

• Landside Connection: The walkway is for passengers and visitors who are not yet in the secure “airside” area. This is useful if you need to check in at one terminal but your flight departs from another, or if you’re meeting someone.
• No Airside Connection: Once you have passed through security in either terminal, you cannot move between terminals. Your flight must be boarded from the terminal in which you clear security.
• Which Terminal? It’s crucial to check your airline in advance, as they are assigned to specific terminals. Generally:
  • Terminal 1 (T1): Most short-haul/European airlines (e.g., Ryanair, Aer Lingus Regional, most other European carriers) and some long-haul.
  • Terminal 2 (T2): Aer Lingus transatlantic flights, and most other long-haul airlines (e.g., American Airlines, United, Emirates).

Pro Tip:

Always double-check your terminal with your airline closer to your travel date, as assignments can occasionally change.

In summary: You can easily walk between T1 and T2 before security, but not after.