Dublin Airport Car Rentals: Best Rates & Zero Hidden Fees

Your valid US driver's license is technically sufficient to drive in Ireland for up to 12 months as a tourist. However, an International Driving Permit (IDP) is strongly recommended—it translates your license into 10 languages and is often required by rental agencies and insurance companies. Rent an IDP from AAA before your trip ($20). Without it, you risk being turned away at the counter or denied insurance claims.

Yes, drivers under 25 face a "young driver surcharge" in Ireland, typically ranging from €25–€35 per day (roughly $27–$38 USD). At 22, you'll definitely fall into this category. Some agencies charge even higher for drivers under 23. Budget an extra €175–€245 per week if you're under 25. No way around this fee—it's mandatory by Irish law for drivers under 25.

Driving on the left is the biggest adjustment for US visitors. At first, you'll instinctively pull into the right lane when turning—and roundabouts feel backwards. Most major Dublin roads have clear signage, but rural N-roads are narrow with stone walls inches from your mirror. Budget 2-3 days of anxious driving before it feels normal. Pro tip: rent a small car (not an SUV)—narrow Irish roads are much easier to navigate in a compact vehicle.

Speed limits differ sharply from the US: Urban areas: 30 km/h (≈19 mph), Rural roads: 80 km/h (≈50 mph), Motorways: 120 km/h (≈75 mph). Gardaí (Irish police) use speed cameras and mobile patrols frequently. A 10 km/h overage can trigger a €80 fine and 3 penalty points on your license—points accumulate fast and can lead to license suspension. Speed limits are posted in km/h, so watch your speedometer closely.

Over 80% of rental cars in Ireland are manual transmission—automatic cars exist but cost 30-50% more and are harder to find, especially in peak season. If you can't drive manual, book your automatic vehicle months in advance and expect to pay a premium. Don't assume the rental agency will have an automatic available if you show up without booking one. Also: diesel-engine vehicles are the norm in Ireland, not gasoline—fill up at diesel pumps only.

Dublin's M50 motorway and the Dublin Port Tunnel have tolls (M50: €2.20–€3.10 depending on payment method). Most rental cars come with an electronic toll tag (e.g., eFlow) already installed—rental agencies charge a daily admin fee (€3–€5.50/day) plus the toll rates, added to your final bill. Alternatively, you can pay within 24 hours online at eflow.ie. Cash is not accepted at most tolls. Budget €15–€30 per week for tolls if you'll be driving in the Dublin area regularly.