| Rialto to Octeville | 5,444.04 mi (8,761.33 km) |
| Rialto to Oignies | 5,557.83 mi (8,944.46 km) |
| Rialto to Oissel | 5,549.05 mi (8,930.33 km) |
| Rialto to Olivet | 5,645.54 mi (9,085.62 km) |
| Rialto to Ollioules | 6,010.78 mi (9,673.42 km) |
| Rialto to Olonne-sur-Mer | 5,578.74 mi (8,978.11 km) |
| Rialto to Oloron-Sainte-Marie | 5,774.29 mi (9,292.83 km) |
| Rialto to Onet Village | 5,836.09 mi (9,392.28 km) |
| Rialto to Onnaing | 5,580.92 mi (8,981.62 km) |
| Rialto to Orange | 5,925.16 mi (9,535.62 km) |
| Rialto to Orchies | 5,565.53 mi (8,956.86 km) |
| Rialto to Orleans | 5,644.00 mi (9,083.14 km) |
| Rialto to Orly | 5,620.35 mi (9,045.07 km) |
| Rialto to Ormesson-sur-Marne | 5,623.17 mi (9,049.61 km) |
| Rialto to Orsay | 5,615.71 mi (9,037.61 km) |
