| Sozopol to Oegstgeest | 1,272.28 mi (2,047.53 km) |
| Sozopol to Oirschot | 1,221.37 mi (1,965.60 km) |
| Sozopol to Oisterwijk | 1,227.52 mi (1,975.50 km) |
| Sozopol to Oldebroek | 1,224.66 mi (1,970.90 km) |
| Sozopol to Oldenzaal | 1,181.54 mi (1,901.51 km) |
| Sozopol to Ommen | 1,207.21 mi (1,942.82 km) |
| Sozopol to Oosterend | 1,235.62 mi (1,988.53 km) |
| Sozopol to Oosterhout | 1,242.71 mi (1,999.96 km) |
| Sozopol to Oosterwolde | 1,226.91 mi (1,974.52 km) |
| Sozopol to Oostzaan | 1,263.00 mi (2,032.61 km) |
| Sozopol to Opmeer | 1,268.11 mi (2,040.82 km) |
| Sozopol to Oss | 1,219.89 mi (1,963.23 km) |
| Sozopol to Oud-Beijerland | 1,265.32 mi (2,036.34 km) |
| Sozopol to Oudenbosch | 1,254.64 mi (2,019.14 km) |
| Sozopol to Oudewater | 1,252.16 mi (2,015.16 km) |
