| Conneaut to Nuth | 3,923.86 mi (6,314.85 km) |
| Conneaut to Oegstgeest | 3,830.23 mi (6,164.15 km) |
| Conneaut to Oirschot | 3,883.03 mi (6,249.13 km) |
| Conneaut to Oisterwijk | 3,876.61 mi (6,238.79 km) |
| Conneaut to Oldebroek | 3,876.42 mi (6,238.49 km) |
| Conneaut to Oldenzaal | 3,919.45 mi (6,307.74 km) |
| Conneaut to Ommen | 3,893.78 mi (6,266.43 km) |
| Conneaut to Oosterend | 3,865.63 mi (6,221.13 km) |
| Conneaut to Oosterhout | 3,861.59 mi (6,214.63 km) |
| Conneaut to Oosterwolde | 3,874.42 mi (6,235.28 km) |
| Conneaut to Oostzaan | 3,838.52 mi (6,177.50 km) |
| Conneaut to Opmeer | 3,833.00 mi (6,168.62 km) |
| Conneaut to Oss | 3,883.04 mi (6,249.15 km) |
| Conneaut to Oud-Beijerland | 3,838.75 mi (6,177.87 km) |
| Conneaut to Oudenbosch | 3,850.43 mi (6,196.68 km) |
