Key Takeaways
- Dublin towers over every other Irish airport. Dublin (DUB) serves roughly 164 regularly-served nonstop destinations — several times more than any other airport in the Republic — and is the home base of both Ryanair and flag carrier Aer Lingus.
- Three airports do almost all the heavy lifting. Dublin, Cork and Shannon handle the overwhelming majority of scheduled flights; Ireland West (Knock), Kerry and Donegal are smaller regional fields.
- Dublin and Shannon clear US immigration before you fly. Both have US Customs and Border Protection preclearance — you complete US entry checks in Ireland and land in the States as a domestic arrival. Dublin reaches about 15 US cities; Shannon adds Boston, Newark, New York and Chicago.
- Belfast and the North aren't in this ranking. Northern Ireland's airports — Belfast International, Belfast City and City of Derry — are part of the UK, so route databases list them with Britain rather than the Republic.
- The smallest fields lean on lifeline routes. Kerry and Donegal survive partly on state-supported (PSO) links to Dublin, while Donegal's run along the Wild Atlantic Way is regularly voted one of the world's most scenic approaches.
Ireland sits on the western edge of Europe, which makes its airports a natural first — and last — stop on the busy transatlantic corridor. The country’s network is dominated by Dublin, one of Europe’s busiest airports and the home of two very different giants: Ryanair, the largest international airline in the world by passenger numbers, and Aer Lingus, the national flag carrier. Behind Dublin sit Cork and Shannon, followed by a handful of small regional airports along the western seaboard.
Below we map and rank the airports of the Republic of Ireland by the number of nonstop destinations each one serves, drawn from live route data on AirportRoutes. Because the figures come from observed flight data — a large sample rather than a complete published timetable — we treat them as a guide to relative connectivity rather than exact official totals. (Northern Ireland’s airports are covered separately — see the note near the end.)
Which Irish airports have direct flights to the US?
Ireland is one of the most convenient places in Europe to fly to the United States, thanks to a feature only two airports outside the Americas share: US preclearance. At Dublin and Shannon, you clear US immigration and customs before boarding, then land in the States as a domestic passenger — skipping the arrivals queues on the far side.
Dublin is the transatlantic powerhouse, with nonstop service to around 15 US cities — among them New York, Newark, Boston, Chicago, Washington, Philadelphia, Atlanta, Orlando, Minneapolis, Seattle, San Francisco and Los Angeles — flown by Aer Lingus alongside US carriers such as United, Delta and American. Shannon, long a historic refuelling stop on the Europe–America route, keeps a focused transatlantic offering to Boston, Newark, New York and Chicago. Cork and the regional airports are short- and medium-haul only; for the US, travellers there connect through Dublin or a European hub.
Ranked
Major Airports in Ireland by Nonstop Destinations
Ranked by regularly-served nonstop destinations, busiest first.
| Airport | IATA | Nonstop | City / Area |
|---|---|---|---|
| 1. Dublin | DUB | 164+ | Dublin |
| 2. Cork | ORK | 46 | Cork |
| 3. Shannon | SNN | 37 | Co. Clare |
| 4. Ireland West (Knock) | NOC | 17 | Co. Mayo |
| 5. Kerry | KIR | 6 | Co. Kerry |
| 6. Donegal | CFN | 2 | Co. Donegal |
A closer look at Ireland’s main airports
✈️ Dublin (DUB)
Dublin Airport, about 10 km north of the city centre at Collinstown, is by far Ireland’s largest and busiest airport, handling well over 30 million passengers a year — one of the busiest in Europe. It is the home base of Aer Lingus and the main hub of Ryanair, whose head office sits just beside the airfield, and it operates two terminals plus US preclearance facilities.
Serving Dublin, DUB reaches roughly 164 regularly-served nonstop destinations, including more than 50 intercontinental routes — comfortably the widest network on the island. Top destinations include Frankfurt, Amsterdam, London, Paris and Manchester, alongside its deep transatlantic schedule.
Main airlines: Ryanair, Aer Lingus, Emerald Airlines (Aer Lingus Regional), SAS, Delta Air Lines. See the full route map for DUB on AirportRoutes →
✈️ Cork (ORK)
Cork Airport, about 6 km south of the city, is Ireland’s second-busiest airport and the main gateway to the south of the country. Perched on a hill that is often the first part of Munster to catch the morning mist, it serves a steady mix of UK and European city routes plus summer-sun leisure flights, and acts as a secondary base for Aer Lingus.
Serving Cork, ORK reaches around 46 regularly-served nonstop destinations. Top destinations include London, Amsterdam, Manchester, Bristol and the leisure markets of Málaga and Faro. It has no scheduled long-haul service — transatlantic passengers connect via Dublin.
Main airlines: Ryanair, Aer Lingus, Emerald Airlines, KLM, Air France. See the full route map for ORK on AirportRoutes →
✈️ Shannon (SNN)
Shannon Airport, on the Shannon Estuary in Co. Clare in the mid-west, holds an outsized place in aviation history: for decades it was the first European stop for piston-engine airliners crossing the Atlantic, and it is said to be the birthplace of duty-free shopping. Today it remains one of only a handful of airports outside the Americas with US preclearance.
Serving the mid-west, SNN reaches about 37 regularly-served nonstop destinations. Its calling card is transatlantic flying — nonstop to Boston, Newark, New York and Chicago — alongside UK and European routes to London, Manchester and sun destinations such as Faro. (Shannon also turns up in the data as a transatlantic diversion and refuelling point, which can inflate raw route counts.)
Main airlines: Ryanair, Aer Lingus, United, Delta Air Lines. See the full route map for SNN on AirportRoutes →
Ireland’s regional airports
Beyond the big three, Ireland’s remaining airports are small fields scattered along the western seaboard. Each runs a modest network — mostly Ryanair links to the UK and Europe, plus state-supported lifeline routes — but together they keep the more remote corners of the country connected.
✈️ Ireland West / Knock (NOC)
Ireland West Airport, at Knock in Co. Mayo, is the main gateway to the west and northwest. Famously championed in the 1980s by a local priest who built it on a foggy hilltop beside the Knock Marian shrine, it has grown into a busy Ryanair base serving the region’s strong UK and emigrant links.
Serving the west of Ireland, NOC reaches about 17 regularly-served nonstop destinations — heavily weighted toward Britain, with London, Liverpool, Manchester, Birmingham and Edinburgh among the top routes, plus summer sun flights. Main airlines: Ryanair, Aer Lingus. See the full route map for NOC on AirportRoutes →
✈️ Kerry (KIR)
Kerry Airport, at Farranfore in the heart of Co. Kerry, is a small airport serving the southwest and the tourist trail of the Ring of Kerry and Dingle. Its network is compact: a Ryanair handful to London, Frankfurt-Hahn, Alicante and Faro, plus a state-supported (PSO) lifeline link to Dublin operated by Emerald Airlines.
Serving Co. Kerry, KIR reaches about 6 regularly-served nonstop destinations. Main airlines: Ryanair, Emerald Airlines (on the Dublin link). See the full route map for KIR on AirportRoutes →
✈️ Donegal (CFN)
Donegal Airport, at Carrickfinn on the wild northwest coast, is Ireland’s most remote commercial airport — and arguably its most beautiful. The approach over Atlantic beaches and the Derryveagh Mountains has repeatedly been voted one of the world’s most scenic. Its tiny scheduled network rests on a state-supported (PSO) link to Dublin, with a seasonal hop to Glasgow.
Serving Co. Donegal, CFN has just 2 regularly-served nonstop destinations — Dublin and Glasgow. Main airlines: Emerald Airlines, Loganair. See the full route map for CFN on AirportRoutes →
What about Belfast and Northern Ireland?
Anyone thinking of “Ireland” as the whole island will notice some familiar names missing above — chiefly Belfast. That’s down to politics rather than geography. Belfast International (BFS), George Best Belfast City (BHD) and City of Derry (LDY) all lie in Northern Ireland, which is part of the United Kingdom. Route databases code each airport to the country it physically sits in, so these gateways are grouped with Britain rather than the Republic.
Belfast International is the busiest airport on the island after Dublin, with a large easyJet and Jet2 presence, while Belfast City focuses on quick business links to London and other UK cities. You’ll find all three on our United Kingdom airports map. Taken together with the Republic’s airports above, they make up the full picture of flying to and from the island of Ireland.
Airport rankings, nonstop-destination counts, served cities, airline lists and US/intercontinental connections are drawn from live AirportRoutes route data (observed AeroAPI flight data — a sample, not a complete published schedule; we use the regularly-served figure, which filters one-off observations). Airport history and notable facts are cross-checked against the cited references. The map is a Mappr original.
Primary Data Source:
- AirportRoutes — Major airports & routes, Ireland – Live route data: per-airport nonstop destinations, served cities, airlines and US/intercontinental connections.
Reference:
- Wikipedia — Dublin, Cork, Shannon, Ireland West, Kerry & Donegal airports – Airport history, location and notable facts referenced in the per-airport sections.
- US Customs and Border Protection — Preclearance locations – Background on US preclearance at Dublin and Shannon airports.
- Locator maps — Google Maps / Google Static Maps – Per-airport location maps with airplane markers, generated via Google Static Maps.
Image Sources:
- Map by Mappr – Map of major airports in Ireland — a Mappr original built from AirportRoutes data and Natural Earth boundaries.
