| Quarteira to Noventa Vicentina | 1,163.88 mi (1,873.09 km) |
| Quarteira to Novi di Modena | 1,125.15 mi (1,810.76 km) |
| Quarteira to Novi Ligure | 1,026.49 mi (1,651.98 km) |
| Quarteira to Nuoro | 964.96 mi (1,552.96 km) |
| Quarteira to Occhiobello | 1,156.82 mi (1,861.72 km) |
| Quarteira to Oderzo | 1,219.89 mi (1,963.22 km) |
| Quarteira to Oggiono | 1,082.60 mi (1,742.28 km) |
| Quarteira to Olbia | 980.04 mi (1,577.22 km) |
| Quarteira to Oleggio | 1,046.12 mi (1,683.56 km) |
| Quarteira to Olgiate Comasco | 1,066.29 mi (1,716.03 km) |
| Quarteira to Olgiate Olona | 1,057.85 mi (1,702.45 km) |
| Quarteira to Omegna | 1,045.91 mi (1,683.23 km) |
| Quarteira to Opera | 1,064.28 mi (1,712.79 km) |
| Quarteira to Oppeano | 1,148.62 mi (1,848.53 km) |
| Quarteira to Orbassano | 979.75 mi (1,576.76 km) |
