| Rialto to Oberkirch | 5,813.25 mi (9,355.52 km) |
| Rialto to Obernburg am Main | 5,778.71 mi (9,299.93 km) |
| Rialto to Obernkirchen | 5,653.68 mi (9,098.72 km) |
| Rialto to Oberschleissheim | 5,933.68 mi (9,549.34 km) |
| Rialto to Oberstdorf | 5,938.85 mi (9,557.66 km) |
| Rialto to Obertraubling | 5,913.43 mi (9,516.74 km) |
| Rialto to Obertshausen | 5,757.90 mi (9,266.45 km) |
| Rialto to Oberursel | 5,743.28 mi (9,242.92 km) |
| Rialto to Ochsenfurt | 5,815.99 mi (9,359.92 km) |
| Rialto to Ochsenhausen | 5,894.28 mi (9,485.92 km) |
| Rialto to Ochtrup | 5,601.20 mi (9,014.26 km) |
| Rialto to Odenthal | 5,657.68 mi (9,105.16 km) |
| Rialto to Oelde | 5,647.90 mi (9,089.41 km) |
| Rialto to Oelsnitz | 5,836.45 mi (9,392.86 km) |
| Rialto to Oer-Erkenschwick | 5,631.18 mi (9,062.50 km) |
