| Rio Rico to Orbetello | 6,150.26 mi (9,897.88 km) |
| Rio Rico to Oria | 6,477.53 mi (10,424.58 km) |
| Rio Rico to Oristano | 6,169.82 mi (9,929.36 km) |
| Rio Rico to Orta Nova | 6,367.40 mi (10,247.35 km) |
| Rio Rico to Orte | 6,192.14 mi (9,965.29 km) |
| Rio Rico to Ortona | 6,269.86 mi (10,090.36 km) |
| Rio Rico to Orvieto | 6,169.64 mi (9,929.08 km) |
| Rio Rico to Orzinuovi | 5,963.56 mi (9,597.42 km) |
| Rio Rico to Osimo | 6,181.44 mi (9,948.07 km) |
| Rio Rico to Ospitaletto | 5,961.22 mi (9,593.66 km) |
| Rio Rico to Ostuni | 6,463.78 mi (10,402.45 km) |
| Rio Rico to Ottaviano | 6,347.16 mi (10,214.77 km) |
| Rio Rico to Ovada | 5,952.65 mi (9,579.87 km) |
| Rio Rico to Ozieri | 6,154.33 mi (9,904.44 km) |
| Rio Rico to Paceco | 6,415.61 mi (10,324.92 km) |
