We recommend at least 1 hour for a comfortable connection at Dublin. The minimum connection time is 40 minutes for domestic flights and 60 minutes for international flights. Transit between terminals takes up to 20 minutes.

Domestic-to-Domestic: 40 min. Domestic-to-International: 50 min. International-to-Domestic: 60 min. International-to-International: 60 min. These are the shortest layovers airlines will sell at Dublin.

Dublin Airport splits operations across two terminals connected by a landside walkway and shuttle bus, which adds friction for transfer passengers compared to a single-building hub. Its standout feature is US Preclearance, letting passengers clear US Customs and Border Protection before departure so they arrive as domestic passengers in the US, but this adds significant extra time for that specific connection. Security queues, especially at peak summer times, have been a well-documented weak point for tight connections. Terminal 1 and Terminal 2 are linked by a covered landside walkway (roughly 8-10 minutes on foot) and a shuttle bus service for those who prefer not to walk, especially with heavy luggage. Because the terminals are landside-connected rather than airside-connected, transfer passengers must re-clear security when moving between terminals unless routed through a dedicated transfer path. Passengers connecting onto US-bound flights face an additional US Preclearance process (CBP screening plus a security recheck) inside Terminal 2, which functions like an extra immigration and security layer.

Still too tight given landside-only terminal transfers and variable security wait times. See full 30 min guide →

Meets the low end of published MCTs but leaves no buffer for peak security lines. See full 45 min guide →

Matches DUB's standard MCT for international connections and allows time for the terminal walk. See full 1 hr guide →

Comfortable for most transfers, including a T1-T2 change with normal security waits. See full 1¼ hr guide →

Solid buffer even during moderately busy periods or a terminal switch. See full 1½ hr guide →

Comfortable for nearly all connections, including those requiring US Preclearance. See full 2 hr guide →

Generous buffer that comfortably covers US Preclearance processing plus terminal transfer. See full 2½ hr guide →

More than enough even during peak summer congestion or long CBP queues. See full 3 hr guide →

Very safe margin, ideal if connecting onto a US Preclearance flight during peak season. See full 4 hr guide →