| Riverton to Orbetello | 5,696.67 mi (9,167.90 km) |
| Riverton to Oria | 6,006.56 mi (9,666.62 km) |
| Riverton to Oristano | 5,740.88 mi (9,239.05 km) |
| Riverton to Orta Nova | 5,900.71 mi (9,496.28 km) |
| Riverton to Orte | 5,733.67 mi (9,227.46 km) |
| Riverton to Ortona | 5,803.74 mi (9,340.22 km) |
| Riverton to Orvieto | 5,710.99 mi (9,190.96 km) |
| Riverton to Orzinuovi | 5,499.73 mi (8,850.95 km) |
| Riverton to Osimo | 5,713.55 mi (9,195.07 km) |
| Riverton to Ospitaletto | 5,496.07 mi (8,845.07 km) |
| Riverton to Ostuni | 5,991.97 mi (9,643.14 km) |
| Riverton to Ottaviano | 5,887.96 mi (9,475.75 km) |
| Riverton to Ovada | 5,497.65 mi (8,847.62 km) |
| Riverton to Ozieri | 5,719.85 mi (9,205.21 km) |
| Riverton to Paceco | 5,979.40 mi (9,622.92 km) |
