How early should I get to DUB?

Dublin Airport, Dublin, Ireland · Checked Oct 25, 2026

The short answer

We suggest you arrive at your terminal 3 hours before your long-haul flight. Allow extra time if you are checking bags or travelling in a group.

Those are blanket rules. Your real number depends on your terminal, the time of day, passport control and whether you're checking a bag. Leave By works out your exact leave time.

Source: dublinairport.com

Passport control on the way out

Ireland has no routine exit passport control, so no Irish officer checks you on the way out. US preclearance is on the ground floor of Terminal 2, beyond Dublin security: you clear US immigration, customs and agriculture checks in Dublin, so you land in the US as a domestic arrival and skip CBP and TSA lines. CBP lists the facility's hours as 07:00 to 16:30 GMT, and Dublin Airport says most, but not all, direct US flights from Terminal 2 are precleared, so check with your airline. Global Entry members can use kiosks at preclearance, and Mobile Passport Control works for US and Canadian citizens, green card holders and ESTA travellers. Because of preclearance, Delta recommends arriving 4 hours before departure at Dublin; Dublin Airport suggests 3 hours.

More on exit checks, the EU's Entry/Exit System and US preclearance: how early for an international flight.

Security lines at DUB

In June 2026, Dublin Airport said 95.2% of departing passengers cleared security in under 15 minutes and 98.2% in under 20 minutes. Terminal 2 security is busiest from 05:00 to 12:00, when most US flights leave. Live times on dublinairport.com and in the app show the median wait over the previous 15 minutes. These figures cover Dublin security only, not the US preclearance queue.

Busiest times: Terminal 2, 05:00-12:00.

Terminals and checkpoints

Terminal 1

Departures securityFast Track is on Departures Level 3 (Mezzanine), open 04:00-21:00, €7.99-€13.99 depending on date and time. Book online up to 5 minutes ahead, at a kiosk, or tap a card at the entrance.

Dublin Airport lists no US airline at T1; Ryanair, Air Canada, WestJet and Air Transat check in here
US flights leave from Terminal 2, a five-minute walk from T1

Terminal 2

Aer Lingus, United, American, Delta, JetBlue

Departures securityBusiest 05:00-12:00. Fast Track is on Departures Level 2, before security, open 04:00-18:00, €7.99-€13.99. Liquids in containers up to 2 litres and electronics can stay in your bag.

U.S. PreclearanceGround floor, after Dublin security. Wait until the flight screens show your allocated time, then go. Global Entry kiosks and Mobile Passport Control are available. A December 2025 traveller report says some passengers are sent to a bag-screening belt here while others go straight to the immigration desks.

All US airlines at Dublin use T2
Aer Lingus offers an evening-before bag drop
There are only a few shops after US preclearance
Dublin Express route 782 stops at T2 before T1

Between terminals: Terminals 1 and 2 are a five-minute walk apart. All US flights use Terminal 2.

Getting to DUB

Rideshare and taxi: Taxis wait outside both terminals and drop you at the kerb near check-in. Dublin Airport estimates a metered fare of €30-45 to or from Dublin city centre. Meter rates are €1.32/km Monday to Saturday 8am-8pm, and €1.81-2.20/km at other times.

Transit: Dublin Express route 782 runs from the city quays and Heuston Station to the airport from about 03:30 to 01:00 (August 2026 timetable), stopping at Terminal 2 first. From Custom House Quay, its last city stop, the ride to T2 takes about 25 minutes; from George's Quay, about 50 minutes. TFI bus routes 16, 19, 24, 33a, 41, 101, 102 and 109A also serve the airport from Zones 11, 13 and 15, and the TFI network runs 24-hour buses to the city.

Driving and parking: The airport is 10 km north of the city, off Junction 2 of the M1. Set-down zones are in front of both terminals; follow signs for T2 Departures. Unattended vehicles are towed. Short-term car parks charge from €4 an hour. Dublin Airport has permission to charge for drop-offs but had not started as of August 2026.

Construction and changes in 2026

Dublin Airport plans to expand the US preclearance facility in Terminal 2. In October 2026 it applied to add a storey to the already approved design. No construction dates have been published.

Checking a bag

Delta and United: check-in and bag drop close 1 hour 15 minutes before departure at Dublin. Aer Lingus: check-in opens 3 hours before; its 2018 fact sheet gave a 75-minute cutoff for economy and 60 minutes for business on US flights, and it offers an evening-before bag drop. American: opens 3.5 hours before; its general cutoff for flights from outside the US is 60 minutes. JetBlue: opens 4 hours before; this research found no published cutoff for Dublin.

DUB tips first-timers miss

Plan on 3 hours, or 4 if you fly Delta. You must finish check-in, Dublin security and US preclearance before boarding.
After Dublin security, watch the screens for your flight's allocated preclearance time, then go straight down to the ground floor.
Use Global Entry kiosks if you are a member. Otherwise, fill in Mobile Passport Control once you reach preclearance to speed up the CBP check.
Do not carry scissors or blades in your cabin bag; Dublin Airport says they are not allowed on US-bound flights.
Food bought before preclearance may be restricted. Keep it in your hand luggage, declare it and show it for inspection.
Eat and shop before preclearance if you can; there are only a few shops after it.

Leaving for DUB?

Pick your flight and where you're starting. Leave By checks live traffic, security lines and your terminal, and tells you the minute to walk out the door.

Free. No account.

Questions travelers ask

How early should I get to Dublin Airport for a flight to the US?

Dublin Airport suggests 3 hours before a long-haul flight. Delta recommends 4 hours at Dublin. Delta and United close check-in and bag drop 1 hour 15 minutes before departure.

Do I go through US customs in Dublin?

Yes, on most direct US flights. US preclearance in Terminal 2 covers US immigration, customs and agriculture checks. You land as a domestic arrival and skip CBP and TSA lines in the US.

Which Dublin terminal do US flights leave from?

Terminal 2. Aer Lingus, United, American, Delta and JetBlue all check in there.

Can I use Global Entry at Dublin preclearance?

Yes. Global Entry members can use the self-service kiosks at US preclearance. Mobile Passport Control is also available.

Is there Irish passport control when leaving Dublin?

No. Ireland has no routine exit passport control. On a precleared US flight, the passport check before boarding is done by US officers at preclearance.

Sources

Airport conditions change. Always follow your airline's check-in and bag-drop deadlines.

Other airport guides

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