| Mesolongi to Oegstgeest | 1,255.04 mi (2,019.79 km) |
| Mesolongi to Oirschot | 1,196.84 mi (1,926.13 km) |
| Mesolongi to Oisterwijk | 1,203.91 mi (1,937.51 km) |
| Mesolongi to Oldebroek | 1,224.88 mi (1,971.26 km) |
| Mesolongi to Oldenzaal | 1,188.62 mi (1,912.89 km) |
| Mesolongi to Ommen | 1,213.44 mi (1,952.85 km) |
| Mesolongi to Oosterend | 1,248.21 mi (2,008.80 km) |
| Mesolongi to Oosterhout | 1,217.53 mi (1,959.43 km) |
| Mesolongi to Oosterwolde | 1,241.29 mi (1,997.66 km) |
| Mesolongi to Oostzaan | 1,254.17 mi (2,018.39 km) |
| Mesolongi to Opmeer | 1,265.11 mi (2,036.00 km) |
| Mesolongi to Oss | 1,202.80 mi (1,935.72 km) |
| Mesolongi to Oud-Beijerland | 1,240.08 mi (1,995.72 km) |
| Mesolongi to Oudenbosch | 1,225.67 mi (1,972.52 km) |
| Mesolongi to Oudewater | 1,234.77 mi (1,987.18 km) |
