| Arouca to Noventa Vicentina | 1,038.88 mi (1,671.91 km) |
| Arouca to Novi di Modena | 1,004.03 mi (1,615.83 km) |
| Arouca to Novi Ligure | 900.35 mi (1,448.97 km) |
| Arouca to Nuoro | 921.25 mi (1,482.60 km) |
| Arouca to Occhiobello | 1,037.22 mi (1,669.25 km) |
| Arouca to Oderzo | 1,090.64 mi (1,755.22 km) |
| Arouca to Oggiono | 942.83 mi (1,517.33 km) |
| Arouca to Olbia | 924.77 mi (1,488.27 km) |
| Arouca to Oleggio | 906.15 mi (1,458.32 km) |
| Arouca to Olgiate Comasco | 924.97 mi (1,488.60 km) |
| Arouca to Olgiate Olona | 918.42 mi (1,478.06 km) |
| Arouca to Omegna | 900.80 mi (1,449.70 km) |
| Arouca to Opera | 929.96 mi (1,496.63 km) |
| Arouca to Oppeano | 1,022.32 mi (1,645.27 km) |
| Arouca to Orbassano | 844.37 mi (1,358.88 km) |
