| Porterville to Noventa Vicentina | 6,026.58 mi (9,698.85 km) |
| Porterville to Novi di Modena | 6,028.72 mi (9,702.28 km) |
| Porterville to Novi Ligure | 5,970.58 mi (9,608.72 km) |
| Porterville to Nuoro | 6,225.04 mi (10,018.24 km) |
| Porterville to Occhiobello | 6,047.73 mi (9,732.89 km) |
| Porterville to Oderzo | 6,027.70 mi (9,700.64 km) |
| Porterville to Oggiono | 5,933.57 mi (9,549.15 km) |
| Porterville to Olbia | 6,198.49 mi (9,975.50 km) |
| Porterville to Oleggio | 5,921.23 mi (9,529.30 km) |
| Porterville to Olgiate Comasco | 5,921.80 mi (9,530.22 km) |
| Porterville to Olgiate Olona | 5,927.20 mi (9,538.91 km) |
| Porterville to Omegna | 5,899.49 mi (9,494.31 km) |
| Porterville to Opera | 5,950.80 mi (9,576.89 km) |
| Porterville to Oppeano | 6,015.19 mi (9,680.51 km) |
| Porterville to Orbassano | 5,918.03 mi (9,524.15 km) |
