| Matosinhos to Nuth | 966.93 mi (1,556.13 km) |
| Matosinhos to Oegstgeest | 980.30 mi (1,577.64 km) |
| Matosinhos to Oirschot | 973.50 mi (1,566.69 km) |
| Matosinhos to Oisterwijk | 974.13 mi (1,567.72 km) |
| Matosinhos to Oldebroek | 1,036.53 mi (1,668.13 km) |
| Matosinhos to Oldenzaal | 1,063.06 mi (1,710.84 km) |
| Matosinhos to Ommen | 1,055.70 mi (1,698.99 km) |
| Matosinhos to Oosterend | 1,067.88 mi (1,718.59 km) |
| Matosinhos to Oosterhout | 966.09 mi (1,554.78 km) |
| Matosinhos to Oosterwolde | 1,074.01 mi (1,728.45 km) |
| Matosinhos to Oostzaan | 1,004.96 mi (1,617.32 km) |
| Matosinhos to Opmeer | 1,020.07 mi (1,641.65 km) |
| Matosinhos to Oss | 992.70 mi (1,597.59 km) |
| Matosinhos to Oud-Beijerland | 960.33 mi (1,545.51 km) |
| Matosinhos to Oudenbosch | 953.16 mi (1,533.96 km) |
