| Didymoteicho to Novi di Modena | 822.37 mi (1,323.48 km) |
| Didymoteicho to Novi Ligure | 922.77 mi (1,485.05 km) |
| Didymoteicho to Nuoro | 898.78 mi (1,446.45 km) |
| Didymoteicho to Occhiobello | 790.28 mi (1,271.83 km) |
| Didymoteicho to Oderzo | 763.81 mi (1,229.24 km) |
| Didymoteicho to Oggiono | 909.40 mi (1,463.53 km) |
| Didymoteicho to Olbia | 883.77 mi (1,422.28 km) |
| Didymoteicho to Oleggio | 940.36 mi (1,513.36 km) |
| Didymoteicho to Olgiate Comasco | 927.37 mi (1,492.46 km) |
| Didymoteicho to Olgiate Olona | 929.03 mi (1,495.12 km) |
| Didymoteicho to Omegna | 955.10 mi (1,537.09 km) |
| Didymoteicho to Opera | 909.64 mi (1,463.93 km) |
| Didymoteicho to Oppeano | 815.27 mi (1,312.04 km) |
| Didymoteicho to Orbassano | 985.74 mi (1,586.40 km) |
| Didymoteicho to Orbetello | 788.77 mi (1,269.40 km) |
