| Kallithea to Novi di Modena | 816.87 mi (1,314.63 km) |
| Kallithea to Novi Ligure | 903.24 mi (1,453.63 km) |
| Kallithea to Nuoro | 786.20 mi (1,265.26 km) |
| Kallithea to Occhiobello | 789.82 mi (1,271.10 km) |
| Kallithea to Oderzo | 789.33 mi (1,270.31 km) |
| Kallithea to Oggiono | 913.20 mi (1,469.65 km) |
| Kallithea to Olbia | 784.01 mi (1,261.75 km) |
| Kallithea to Oleggio | 936.75 mi (1,507.56 km) |
| Kallithea to Olgiate Comasco | 929.06 mi (1,495.18 km) |
| Kallithea to Olgiate Olona | 927.35 mi (1,492.43 km) |
| Kallithea to Omegna | 955.68 mi (1,538.01 km) |
| Kallithea to Opera | 904.79 mi (1,456.11 km) |
| Kallithea to Oppeano | 820.45 mi (1,320.39 km) |
| Kallithea to Orbassano | 965.81 mi (1,554.33 km) |
| Kallithea to Orbetello | 727.43 mi (1,170.69 km) |
