| Hamina to Oegstgeest | 1,036.68 mi (1,668.37 km) |
| Hamina to Oirschot | 1,043.96 mi (1,680.09 km) |
| Hamina to Oisterwijk | 1,042.91 mi (1,678.39 km) |
| Hamina to Oldebroek | 979.84 mi (1,576.91 km) |
| Hamina to Oldenzaal | 954.82 mi (1,536.63 km) |
| Hamina to Ommen | 960.87 mi (1,546.38 km) |
| Hamina to Oosterend | 948.88 mi (1,527.07 km) |
| Hamina to Oosterhout | 1,050.44 mi (1,690.52 km) |
| Hamina to Oosterwolde | 942.52 mi (1,516.84 km) |
| Hamina to Oostzaan | 1,012.03 mi (1,628.71 km) |
| Hamina to Opmeer | 997.60 mi (1,605.48 km) |
| Hamina to Oss | 1,024.35 mi (1,648.53 km) |
| Hamina to Oud-Beijerland | 1,056.11 mi (1,699.65 km) |
| Hamina to Oudenbosch | 1,063.24 mi (1,711.12 km) |
| Hamina to Oudewater | 1,032.18 mi (1,661.14 km) |
