| Dublin to Novi di Modena | 967.23 mi (1,556.61 km) |
| Dublin to Novi Ligure | 900.33 mi (1,448.94 km) |
| Dublin to Nuoro | 1,158.48 mi (1,864.39 km) |
| Dublin to Occhiobello | 990.32 mi (1,593.77 km) |
| Dublin to Oderzo | 985.30 mi (1,585.68 km) |
| Dublin to Oggiono | 870.20 mi (1,400.45 km) |
| Dublin to Olbia | 1,129.26 mi (1,817.36 km) |
| Dublin to Oleggio | 853.75 mi (1,373.98 km) |
| Dublin to Olgiate Comasco | 856.65 mi (1,378.65 km) |
| Dublin to Olgiate Olona | 860.85 mi (1,385.41 km) |
| Dublin to Omegna | 832.56 mi (1,339.88 km) |
| Dublin to Opera | 884.46 mi (1,423.40 km) |
| Dublin to Oppeano | 958.40 mi (1,542.40 km) |
| Dublin to Orbassano | 846.22 mi (1,361.86 km) |
| Dublin to Orbetello | 1,100.66 mi (1,771.34 km) |
