| Port Royal to Noventa Vicentina | 4,772.81 mi (7,681.10 km) |
| Port Royal to Novi di Modena | 4,756.40 mi (7,654.68 km) |
| Port Royal to Novi Ligure | 4,665.93 mi (7,509.09 km) |
| Port Royal to Nuoro | 4,820.36 mi (7,757.61 km) |
| Port Royal to Occhiobello | 4,785.65 mi (7,701.77 km) |
| Port Royal to Oderzo | 4,799.88 mi (7,724.66 km) |
| Port Royal to Oggiono | 4,662.36 mi (7,503.34 km) |
| Port Royal to Olbia | 4,810.22 mi (7,741.30 km) |
| Port Royal to Oleggio | 4,635.77 mi (7,460.55 km) |
| Port Royal to Olgiate Comasco | 4,645.46 mi (7,476.14 km) |
| Port Royal to Olgiate Olona | 4,645.93 mi (7,476.89 km) |
| Port Royal to Omegna | 4,618.12 mi (7,432.15 km) |
| Port Royal to Opera | 4,667.67 mi (7,511.88 km) |
| Port Royal to Oppeano | 4,756.93 mi (7,655.54 km) |
| Port Royal to Orbassano | 4,603.03 mi (7,407.87 km) |
