| Twin Rivers to Orbetello | 4,244.04 mi (6,830.13 km) |
| Twin Rivers to Oria | 4,596.98 mi (7,398.13 km) |
| Twin Rivers to Oristano | 4,213.33 mi (6,780.69 km) |
| Twin Rivers to Orta Nova | 4,481.58 mi (7,212.41 km) |
| Twin Rivers to Orte | 4,295.02 mi (6,912.16 km) |
| Twin Rivers to Ortona | 4,387.01 mi (7,060.21 km) |
| Twin Rivers to Orvieto | 4,273.90 mi (6,878.18 km) |
| Twin Rivers to Orzinuovi | 4,089.44 mi (6,581.32 km) |
| Twin Rivers to Osimo | 4,306.89 mi (6,931.27 km) |
| Twin Rivers to Ospitaletto | 4,090.43 mi (6,582.91 km) |
| Twin Rivers to Ostuni | 4,585.85 mi (7,380.22 km) |
| Twin Rivers to Ottaviano | 4,445.09 mi (7,153.68 km) |
| Twin Rivers to Ovada | 4,058.24 mi (6,531.11 km) |
| Twin Rivers to Ozieri | 4,208.76 mi (6,773.35 km) |
| Twin Rivers to Paceco | 4,464.05 mi (7,184.19 km) |
