| Estoril to Noventa Vicentina | 1,162.68 mi (1,871.16 km) |
| Estoril to Novi di Modena | 1,125.79 mi (1,811.78 km) |
| Estoril to Novi Ligure | 1,023.75 mi (1,647.57 km) |
| Estoril to Nuoro | 1,002.81 mi (1,613.86 km) |
| Estoril to Occhiobello | 1,158.46 mi (1,864.37 km) |
| Estoril to Oderzo | 1,216.72 mi (1,958.12 km) |
| Estoril to Oggiono | 1,072.87 mi (1,726.62 km) |
| Estoril to Olbia | 1,012.57 mi (1,629.57 km) |
| Estoril to Oleggio | 1,036.04 mi (1,667.34 km) |
| Estoril to Olgiate Comasco | 1,055.60 mi (1,698.83 km) |
| Estoril to Olgiate Olona | 1,048.15 mi (1,686.83 km) |
| Estoril to Omegna | 1,032.98 mi (1,662.43 km) |
| Estoril to Opera | 1,057.41 mi (1,701.74 km) |
| Estoril to Oppeano | 1,146.64 mi (1,845.33 km) |
| Estoril to Orbassano | 971.67 mi (1,563.75 km) |
