| Drogheda to Novi di Modena | 983.38 mi (1,582.60 km) |
| Drogheda to Novi Ligure | 918.12 mi (1,477.57 km) |
| Drogheda to Nuoro | 1,179.00 mi (1,897.42 km) |
| Drogheda to Occhiobello | 1,005.98 mi (1,618.96 km) |
| Drogheda to Oderzo | 999.40 mi (1,608.38 km) |
| Drogheda to Oggiono | 886.51 mi (1,426.69 km) |
| Drogheda to Olbia | 1,149.37 mi (1,849.73 km) |
| Drogheda to Oleggio | 870.80 mi (1,401.42 km) |
| Drogheda to Olgiate Comasco | 873.25 mi (1,405.36 km) |
| Drogheda to Olgiate Olona | 877.67 mi (1,412.48 km) |
| Drogheda to Omegna | 849.47 mi (1,367.09 km) |
| Drogheda to Opera | 901.31 mi (1,450.51 km) |
| Drogheda to Oppeano | 973.93 mi (1,567.39 km) |
| Drogheda to Orbassano | 864.70 mi (1,391.60 km) |
| Drogheda to Orbetello | 1,118.73 mi (1,800.42 km) |
