Do You Need a Passport to Go to Ireland? (2025 Guide)

You’ve heard the old line about the Common Travel Area making Ireland and the UK almost a single travel zone — but between airline boarding rules, post-Brexit adjustments, and new digital entry systems, the actual answer to “do I need a passport?” depends on who you are and how you’re crossing.

UK citizens (by law): Passport not legally required but strongly recommended ·
EU/EEA citizens: Valid passport or national identity card ·
Non-EU/non-UK citizens: Valid passport mandatory (visa may be needed) ·
Children (all nationalities): Passport required for all, including infants ·
Air travel (any carrier): Passport or EU ID required for boarding ·
Post-2026 rule change (Aer Lingus): All passengers likely need passport or EU ID

Five key dates and thresholds shape the document decision — one pattern: the gap between what the law permits and what carriers enforce is where most travellers get tripped up.

Do you need a passport to go from the UK to the Republic of Ireland?

Rules for UK citizens

UK citizens are not legally required to show a passport to enter the Republic of Ireland. The Common Travel Area (CTA), which dates back to 1923, allows free movement without systematic passport checks. However, the official guidance from Ireland.com (Republic of Ireland tourism authority) strongly recommends carrying a passport or other valid photo ID because airlines and ferry operators typically demand one for boarding. GOV.UK (UK government travel guidance) confirms that Irish citizens can use official photo identification instead of a passport.

Rules for Irish citizens

Irish citizens returning from the UK can use any official photo ID, such as a driving licence or passport card. The GOV.UK (UK government travel guidance) notes that they may continue to enter and live in the UK without a visa.

What about Northern Ireland?

Travel within the island of Ireland (Republic to Northern Ireland and vice versa) is border-free under the CTA. But from 2 April 2025, people who need a visa to enter the UK and travel to Northern Ireland directly or via the Republic will need an Electronic Travel Authorisation (ETA) assigned to a valid passport, according to Ireland.com (Republic of Ireland tourism authority). Most UK and Irish citizens do not need an ETA for travel to the Republic of Ireland.

Enforcement at borders

In practice, the land border between Northern Ireland and the Republic remains open and without routine passport checks. However, air and sea carriers require some form of photo identification, usually a passport or driving licence, as stated on Ireland.com (Republic of Ireland tourism authority). The trade-off: you may legally enter without a passport, but you might not make it onto the plane.

The implication: the legal flexibility is increasingly at odds with carrier requirements, making a passport the safest choice.

Can you fly to the Republic of Ireland without a passport?

Aer Lingus policy

Aer Lingus, Ireland’s flag carrier, requires all passengers who are not UK or Irish nationals to carry a valid passport. The official Ireland.com (Republic of Ireland tourism authority) guidance states that air and sea carriers demand photo ID, and Aer Lingus’ own rules stipulate that UK and Irish nationals may use a driving licence, but other travellers must have a passport. From February 2026, Aer Lingus will tighten requirements so that all passengers, including UK and Irish citizens, need a passport or EU ID card.

Ryanair and other carriers

Ryanair, the largest low-cost carrier on UK-Ireland routes, follows similar rules. According to Citizens Advice (UK consumer rights charity), airlines generally require a valid passport for non-UK, non-Irish nationals. For intra-CTA travel, Ryanair accepts a driving licence for UK and Irish citizens, but it is at the airline’s discretion.

EU ID card as alternative

EU/EEA citizens can fly to Ireland using a valid national identity card, as confirmed by Ireland.com (Republic of Ireland tourism authority). However, carriers may have additional checks, and from 2026 Aer Lingus will likely require all passengers to hold either a passport or an EU ID card.

What to expect at check-in

Check-in staff will ask for travel documents before issuing a boarding pass. Without acceptable ID, you will be denied boarding. The GOV.UK (UK government travel guidance) stresses that all schoolchildren must have their own passport to visit the UK, and same rules apply for travel to Ireland.

What this means: relying on a driving licence for air travel carries growing risk of being turned away at the gate.

Can I travel to Ireland with an ID?

Accepted ID cards for EU citizens

EU/EEA citizens can use a valid national identity card as their travel document, as per Ireland.com (Republic of Ireland tourism authority). This is accepted for both air and sea travel, though carriers may still request additional verification.

Driving licence validity

UK driving licences are accepted by some airlines and ferry companies for UK and Irish citizens travelling within the CTA, according to Ireland.com (Republic of Ireland tourism authority). But a driving licence is not a valid travel document for non-UK nationals, and it cannot be used for border entry into Ireland or the UK for non-CTA travellers.

National identity cards vs passports

A national identity card offers the same legal standing as a passport for EU/EEA citizens entering Ireland. However, GOV.UK (UK government travel guidance) reminds travellers that the UK does not accept national identity cards from non-EEA nationals. For those travelling onward to Northern Ireland, a passport is strongly advised.

Non-EU citizens and ID

Non-EU citizens must present a valid passport. No other form of ID is accepted for travel to Ireland, as confirmed by Ireland.com (Republic of Ireland tourism authority).

The catch: what works for one carrier may be rejected by another, so a passport remains the most reliable option.

Can I fly with an expired passport?

UK passport expiry rules

Citizens Advice (UK consumer rights charity) advises that a UK passport must not be 10 years old or more on the day you enter an EU country, and it must have at least 3 months remaining validity for the whole stay. These rules apply to travel to Ireland (which is not in the Schengen area but follows EU passport validity rules for air travel).

EU passport renewals

EU citizens travelling to Ireland need a passport valid for the duration of their stay. There is no 10-year limit for EU passports, but the document must be valid at the time of travel. GOV.UK (UK government travel guidance) states that for UK entry, a passport must be valid for the whole stay.

Aer Lingus policy on expired documents

Aer Lingus, like other airlines, does not accept expired passports for boarding. The Ireland.com (Republic of Ireland tourism authority) guidance is clear: all passengers must present valid travel documents.

Emergency travel documents

If your passport expires while abroad, consult your country’s embassy or consulate. They may issue an emergency travel document (ETD) that allows a one-way flight home. GOV.UK (UK government travel guidance) explains that ETDs are accepted for entry to the UK.

The pattern: passport validity requirements are strict and non-negotiable for boarding, regardless of legal entry allowances.

Do you need a passport to go to Ireland after Brexit?

Changes for UK citizens

Brexit did not change the Common Travel Area. UK citizens still do not need a passport to enter the Republic of Ireland by land, sea, or air. However, GOV.UK (UK government travel guidance) notes that UK citizens now need a valid passport to enter the EU, and Ireland applies similar rules for entry from outside the CTA. In practice, airlines treat UK citizens as needing photo ID.

Changes for EU citizens

Before Brexit, EU citizens could enter Ireland with just a national identity card. That remains true for entry to Ireland, but for travel to the UK (including Northern Ireland), GOV.UK (UK government travel guidance) now advises that from 2 April 2025, non-visa nationals will need an ETA, and everyone needs a passport or valid ID card.

Impact on the Common Travel Area

The CTA remains in place and is not affected by Brexit. The Ireland.com (Republic of Ireland tourism authority) confirms that UK and Irish citizens can still travel freely within the CTA without passports.

Future requirements from 2026

From February 2026, Aer Lingus will require all passengers (including UK and Irish citizens) to present a passport or EU ID card. The Ireland.com (Republic of Ireland tourism authority) advises travellers to check with their carrier before travel.

The implication: the post-Brexit landscape complicates document decisions for EU nationals, while UK citizens face gradual carrier-driven restrictions.

Timeline

• 1923 – Common Travel Area established between Ireland and the UK (Ireland.com – official tourism authority)
• 1998 – Good Friday Agreement reaffirms open border (Ireland.com – official tourism authority)
• 31 January 2020 – UK leaves the EU; CTA remains in effect (Ireland.com – official tourism authority)
• 2025 (projected) – EU Entry/Exit System (EES) launch for non‑EU travellers (GOV.UK – UK government travel guidance)
• February 2026 – Aer Lingus tightens document requirements for all passengers (Ireland.com – official tourism authority)

The pattern: each milestone adds another layer of enforcement, even as the CTA remains legally intact.

What we know vs what’s uncertain

The pattern: confirmed rules remain stable, but the upcoming changes introduce significant uncertainty.

“British nationals are not legally required to show a passport but we recommend you carry yours.”

GOV.UK – UK government travel advice

“It is compulsory for all passengers (including babies) to have a valid passport or EU ID card.”

Irish Ferries via Ireland.com – official tourism authority

“Not an Irish or UK national? You must travel with a valid passport.”

Aer Lingus requirements via Ireland.com – official tourism authority

The pattern across these official statements is clear: the law may be generous, but carriers are increasingly strict. For UK and Irish citizens, the practical advice is to carry a passport even when not required by law. For everyone else, a valid passport is non-negotiable.

For a detailed breakdown of country-specific entry rules, including post-Brexit changes for UK citizens, see the companion guide.

Frequently asked questions

For UK travellers, the choice is simple: carry a valid passport if you fly, even when the law doesn’t require it. The alternative — relying on a driving licence that may not be accepted by your airline — risks a missed flight and a wasted day at the airport.