| Rietavas to Orbetello | 1,035.05 mi (1,665.75 km) |
| Rietavas to Oria | 1,069.41 mi (1,721.04 km) |
| Rietavas to Oristano | 1,250.73 mi (2,012.86 km) |
| Rietavas to Orta Nova | 1,032.92 mi (1,662.33 km) |
| Rietavas to Orte | 1,010.51 mi (1,626.26 km) |
| Rietavas to Ortona | 983.19 mi (1,582.29 km) |
| Rietavas to Orvieto | 999.30 mi (1,608.21 km) |
| Rietavas to Orzinuovi | 883.67 mi (1,422.13 km) |
| Rietavas to Osimo | 924.48 mi (1,487.81 km) |
| Rietavas to Ospitaletto | 870.97 mi (1,401.70 km) |
| Rietavas to Ostuni | 1,053.92 mi (1,696.11 km) |
| Rietavas to Ottaviano | 1,081.38 mi (1,740.31 km) |
| Rietavas to Ovada | 961.67 mi (1,547.66 km) |
| Rietavas to Ozieri | 1,199.03 mi (1,929.66 km) |
| Rietavas to Paceco | 1,300.25 mi (2,092.55 km) |
