| Mullingar to Novi di Modena | 1,011.71 mi (1,628.18 km) |
| Mullingar to Novi Ligure | 943.69 mi (1,518.72 km) |
| Mullingar to Nuoro | 1,198.74 mi (1,929.19 km) |
| Mullingar to Occhiobello | 1,035.06 mi (1,665.77 km) |
| Mullingar to Oderzo | 1,030.68 mi (1,658.71 km) |
| Mullingar to Oggiono | 914.60 mi (1,471.91 km) |
| Mullingar to Olbia | 1,170.10 mi (1,883.10 km) |
| Mullingar to Oleggio | 897.69 mi (1,444.69 km) |
| Mullingar to Olgiate Comasco | 900.89 mi (1,449.84 km) |
| Mullingar to Olgiate Olona | 904.94 mi (1,456.35 km) |
| Mullingar to Omegna | 876.59 mi (1,410.74 km) |
| Mullingar to Opera | 928.52 mi (1,494.32 km) |
| Mullingar to Oppeano | 1,003.21 mi (1,614.51 km) |
| Mullingar to Orbassano | 888.99 mi (1,430.69 km) |
| Mullingar to Orbetello | 1,143.73 mi (1,840.65 km) |
