| Ithaca to Nuth | 3,742.24 mi (6,022.55 km) |
| Ithaca to Oegstgeest | 3,650.37 mi (5,874.71 km) |
| Ithaca to Oirschot | 3,702.24 mi (5,958.18 km) |
| Ithaca to Oisterwijk | 3,695.93 mi (5,948.02 km) |
| Ithaca to Oldebroek | 3,698.04 mi (5,951.42 km) |
| Ithaca to Oldenzaal | 3,741.44 mi (6,021.27 km) |
| Ithaca to Ommen | 3,715.87 mi (5,980.12 km) |
| Ithaca to Oosterend | 3,688.57 mi (5,936.19 km) |
| Ithaca to Oosterhout | 3,680.82 mi (5,923.71 km) |
| Ithaca to Oosterwolde | 3,697.48 mi (5,950.52 km) |
| Ithaca to Oostzaan | 3,659.47 mi (5,889.34 km) |
| Ithaca to Opmeer | 3,654.57 mi (5,881.47 km) |
| Ithaca to Oss | 3,702.95 mi (5,959.32 km) |
| Ithaca to Oud-Beijerland | 3,658.07 mi (5,887.09 km) |
| Ithaca to Oudenbosch | 3,669.35 mi (5,905.24 km) |
