| Arcos de Valdevez to Nuth | 923.00 mi (1,485.42 km) |
| Arcos de Valdevez to Oegstgeest | 934.44 mi (1,503.84 km) |
| Arcos de Valdevez to Oirschot | 928.63 mi (1,494.49 km) |
| Arcos de Valdevez to Oisterwijk | 929.14 mi (1,495.30 km) |
| Arcos de Valdevez to Oldebroek | 991.12 mi (1,595.05 km) |
| Arcos de Valdevez to Oldenzaal | 1,018.24 mi (1,638.69 km) |
| Arcos de Valdevez to Ommen | 1,010.46 mi (1,626.18 km) |
| Arcos de Valdevez to Oosterend | 1,022.11 mi (1,644.93 km) |
| Arcos de Valdevez to Oosterhout | 920.87 mi (1,481.99 km) |
| Arcos de Valdevez to Oosterwolde | 1,028.35 mi (1,654.97 km) |
| Arcos de Valdevez to Oostzaan | 959.10 mi (1,543.52 km) |
| Arcos de Valdevez to Opmeer | 974.05 mi (1,567.59 km) |
| Arcos de Valdevez to Oss | 947.69 mi (1,525.16 km) |
| Arcos de Valdevez to Oud-Beijerland | 914.73 mi (1,472.11 km) |
| Arcos de Valdevez to Oudenbosch | 907.81 mi (1,460.98 km) |
