| Argostoli to Oegstgeest | 1,237.55 mi (1,991.65 km) |
| Argostoli to Oirschot | 1,178.98 mi (1,897.38 km) |
| Argostoli to Oisterwijk | 1,186.09 mi (1,908.83 km) |
| Argostoli to Oldebroek | 1,209.72 mi (1,946.86 km) |
| Argostoli to Oldenzaal | 1,174.60 mi (1,890.33 km) |
| Argostoli to Ommen | 1,199.10 mi (1,929.77 km) |
| Argostoli to Oosterend | 1,234.33 mi (1,986.47 km) |
| Argostoli to Oosterhout | 1,199.41 mi (1,930.27 km) |
| Argostoli to Oosterwolde | 1,227.68 mi (1,975.76 km) |
| Argostoli to Oostzaan | 1,237.69 mi (1,991.86 km) |
| Argostoli to Opmeer | 1,249.23 mi (2,010.44 km) |
| Argostoli to Oss | 1,185.76 mi (1,908.30 km) |
| Argostoli to Oud-Beijerland | 1,221.77 mi (1,966.25 km) |
| Argostoli to Oudenbosch | 1,207.03 mi (1,942.52 km) |
| Argostoli to Oudewater | 1,217.43 mi (1,959.27 km) |
