| Sinop to Nuth | 1,509.24 mi (2,428.89 km) |
| Sinop to Oegstgeest | 1,588.57 mi (2,556.56 km) |
| Sinop to Oirschot | 1,542.88 mi (2,483.02 km) |
| Sinop to Oisterwijk | 1,548.39 mi (2,491.89 km) |
| Sinop to Oldebroek | 1,534.93 mi (2,470.23 km) |
| Sinop to Oldenzaal | 1,490.54 mi (2,398.80 km) |
| Sinop to Ommen | 1,515.42 mi (2,438.83 km) |
| Sinop to Oosterend | 1,539.45 mi (2,477.51 km) |
| Sinop to Oosterhout | 1,563.66 mi (2,516.47 km) |
| Sinop to Oosterwolde | 1,530.27 mi (2,462.73 km) |
| Sinop to Oostzaan | 1,575.85 mi (2,536.09 km) |
| Sinop to Opmeer | 1,578.03 mi (2,539.59 km) |
| Sinop to Oss | 1,538.23 mi (2,475.54 km) |
| Sinop to Oud-Beijerland | 1,585.42 mi (2,551.49 km) |
| Sinop to Oudenbosch | 1,576.76 mi (2,537.54 km) |
