| Cascais to Noventa Vicentina | 1,163.69 mi (1,872.78 km) |
| Cascais to Novi di Modena | 1,126.80 mi (1,813.40 km) |
| Cascais to Novi Ligure | 1,024.76 mi (1,649.19 km) |
| Cascais to Nuoro | 1,003.84 mi (1,615.52 km) |
| Cascais to Occhiobello | 1,159.47 mi (1,865.99 km) |
| Cascais to Oderzo | 1,217.72 mi (1,959.73 km) |
| Cascais to Oggiono | 1,073.86 mi (1,728.21 km) |
| Cascais to Olbia | 1,013.60 mi (1,631.24 km) |
| Cascais to Oleggio | 1,037.03 mi (1,668.93 km) |
| Cascais to Olgiate Comasco | 1,056.59 mi (1,700.41 km) |
| Cascais to Olgiate Olona | 1,049.14 mi (1,688.42 km) |
| Cascais to Omegna | 1,033.97 mi (1,664.01 km) |
| Cascais to Opera | 1,058.41 mi (1,703.34 km) |
| Cascais to Oppeano | 1,147.64 mi (1,846.95 km) |
| Cascais to Orbassano | 972.66 mi (1,565.35 km) |
