| Type | Airport Name | City | IATA Code | Connectivity | Distance |
| Dublin Airport | Dublin | DUB | 8.79 km | ||
| Waterford Airport | Waterford | WAT | 151.51 km | ||
| Ireland West Knock Airport | Charleston | NOC | 184.73 km | ||
| Galway Airport | Galway | GWY | 186.55 km | ||
| Shannon Airport | Limerick | SNN | 202.75 km |
=Medium Airport,
=Large Airport
Connectivity ratings are based on the airport's flight routes to other airports.
The above list contains Regional/Domestic as well as International airports.
| City/Town/Village | Distance |
| Portmarnock(County Dublin) | 0 km |
| Saint Marnocks(County Dublin) | 1.09 km |
| Balgriffin(County Dublin) | 2.86 km |
| Feltrim(County Dublin) | 2.98 km |
| Malahide(County Dublin) | 3.29 km |
| City/Town/Village | Distance |
| Dublin(County Dublin) | 12.44 km |
| Dun Laoghaire(County Dublin) | 14.53 km |
| Drogheda(County Louth) | 35.7 km |
| Dun Dealgan(County Louth) | 66.73 km |
| Bray(County Wicklow) | 24.63 km |
Airports Near Portmarnock, County Dublin, Ireland on map