| Niksic to Olympia Heights (Florida) | 5,469.51 mi (8,802.33 km) |
| Niksic to Omaha (Nebraska) | 5,361.73 mi (8,628.87 km) |
| Niksic to On Top of the World Designated Place (Florida) | 5,399.47 mi (8,689.61 km) |
| Niksic to Onalaska (Wisconsin) | 5,059.66 mi (8,142.74 km) |
| Niksic to Oneida (New York) | 4,499.27 mi (7,240.88 km) |
| Niksic to Oneonta (New York) | 4,500.28 mi (7,242.51 km) |
| Niksic to Ontario (California) | 6,461.77 mi (10,399.21 km) |
| Niksic to Ontario (Oregon) | 5,850.34 mi (9,415.22 km) |
| Niksic to Opa-locka (Florida) | 5,457.48 mi (8,782.96 km) |
| Niksic to Opelika (Alabama) | 5,366.20 mi (8,636.06 km) |
| Niksic to Opelousas (Louisiana) | 5,749.99 mi (9,253.71 km) |
| Niksic to Orange (California) | 6,482.05 mi (10,431.85 km) |
| Niksic to Orange (Texas) | 5,838.86 mi (9,396.73 km) |
| Niksic to Orange City (Florida) | 5,362.95 mi (8,630.84 km) |
| Niksic to Orangeburg (South Carolina) | 5,134.41 mi (8,263.03 km) |
