| Nelas to Olympia Heights (Florida) | 4,199.99 mi (6,759.23 km) |
| Nelas to Omaha (Nebraska) | 4,386.59 mi (7,059.54 km) |
| Nelas to On Top of the World Designated Place (Florida) | 4,171.93 mi (6,714.08 km) |
| Nelas to Onalaska (Wisconsin) | 4,082.39 mi (6,569.98 km) |
| Nelas to Oneida (New York) | 3,399.43 mi (5,470.85 km) |
| Nelas to Oneonta (New York) | 3,387.25 mi (5,451.25 km) |
| Nelas to Ontario (California) | 5,619.45 mi (9,043.63 km) |
| Nelas to Ontario (Oregon) | 5,126.18 mi (8,249.78 km) |
| Nelas to Opa-locka (Florida) | 4,188.91 mi (6,741.40 km) |
| Nelas to Opelika (Alabama) | 4,196.44 mi (6,753.51 km) |
| Nelas to Opelousas (Louisiana) | 4,607.44 mi (7,414.96 km) |
| Nelas to Orange (California) | 5,639.62 mi (9,076.09 km) |
| Nelas to Orange (Texas) | 4,705.51 mi (7,572.78 km) |
| Nelas to Orange City (Florida) | 4,127.43 mi (6,642.46 km) |
| Nelas to Orangeburg (South Carolina) | 3,942.81 mi (6,345.34 km) |
