| Arcos de Valdevez to Oerlinghausen | 1,062.65 mi (1,710.16 km) |
| Arcos de Valdevez to Oestrich-Winkel | 966.13 mi (1,554.83 km) |
| Arcos de Valdevez to Offenburg | 915.91 mi (1,474.02 km) |
| Arcos de Valdevez to Oftersheim | 969.07 mi (1,559.56 km) |
| Arcos de Valdevez to Ohrdruf | 1,099.20 mi (1,768.99 km) |
| Arcos de Valdevez to Ohringen | 1,001.55 mi (1,611.84 km) |
| Arcos de Valdevez to Olbernhau | 1,198.02 mi (1,928.03 km) |
| Arcos de Valdevez to Olching | 1,055.06 mi (1,697.95 km) |
| Arcos de Valdevez to Oldenburg | 1,095.83 mi (1,763.57 km) |
| Arcos de Valdevez to Oldenburg in Holstein | 1,231.02 mi (1,981.14 km) |
| Arcos de Valdevez to Olfen | 1,007.97 mi (1,622.18 km) |
| Arcos de Valdevez to Olpe | 996.34 mi (1,603.46 km) |
| Arcos de Valdevez to Olsberg | 1,032.50 mi (1,661.64 km) |
| Arcos de Valdevez to Oranienburg | 1,255.71 mi (2,020.86 km) |
| Arcos de Valdevez to Ortenberg | 1,018.88 mi (1,639.74 km) |
