| Barcelos to Nuth | 946.80 mi (1,523.72 km) |
| Barcelos to Oegstgeest | 958.96 mi (1,543.30 km) |
| Barcelos to Oirschot | 952.79 mi (1,533.37 km) |
| Barcelos to Oisterwijk | 953.35 mi (1,534.26 km) |
| Barcelos to Oldebroek | 1,015.48 mi (1,634.26 km) |
| Barcelos to Oldenzaal | 1,042.38 mi (1,677.56 km) |
| Barcelos to Ommen | 1,034.76 mi (1,665.29 km) |
| Barcelos to Oosterend | 1,046.60 mi (1,684.35 km) |
| Barcelos to Oosterhout | 945.16 mi (1,521.09 km) |
| Barcelos to Oosterwolde | 1,052.80 mi (1,694.32 km) |
| Barcelos to Oostzaan | 983.62 mi (1,582.98 km) |
| Barcelos to Opmeer | 998.63 mi (1,607.14 km) |
| Barcelos to Oss | 971.91 mi (1,564.13 km) |
| Barcelos to Oud-Beijerland | 939.16 mi (1,511.43 km) |
| Barcelos to Oudenbosch | 932.15 mi (1,500.15 km) |
