| Union City to Orbetello | 6,173.68 mi (9,935.58 km) |
| Union City to Oria | 6,467.34 mi (10,408.17 km) |
| Union City to Oristano | 6,234.73 mi (10,033.83 km) |
| Union City to Orta Nova | 6,365.89 mi (10,244.91 km) |
| Union City to Orte | 6,206.70 mi (9,988.72 km) |
| Union City to Ortona | 6,270.18 mi (10,090.88 km) |
| Union City to Orvieto | 6,184.06 mi (9,952.29 km) |
| Union City to Orzinuovi | 5,970.44 mi (9,608.49 km) |
| Union City to Osimo | 6,179.27 mi (9,944.58 km) |
| Union City to Ospitaletto | 5,965.77 mi (9,600.98 km) |
| Union City to Ostuni | 6,452.16 mi (10,383.75 km) |
| Union City to Ottaviano | 6,359.19 mi (10,234.13 km) |
| Union City to Ovada | 5,975.16 mi (9,616.09 km) |
| Union City to Ozieri | 6,210.20 mi (9,994.35 km) |
| Union City to Paceco | 6,466.70 mi (10,407.14 km) |
