| Nidderau to Olympia Heights (Florida) | 4,839.32 mi (7,788.13 km) |
| Nidderau to Omaha (Nebraska) | 4,662.28 mi (7,503.21 km) |
| Nidderau to On Top of the World Designated Place (Florida) | 4,750.27 mi (7,644.82 km) |
| Nidderau to Onalaska (Wisconsin) | 4,361.15 mi (7,018.59 km) |
| Nidderau to Oneida (New York) | 3,820.45 mi (6,148.42 km) |
| Nidderau to Oneonta (New York) | 3,824.30 mi (6,154.61 km) |
| Nidderau to Ontario (California) | 5,761.57 mi (9,272.36 km) |
| Nidderau to Ontario (Oregon) | 5,157.09 mi (8,299.54 km) |
| Nidderau to Opa-locka (Florida) | 4,826.88 mi (7,768.11 km) |
| Nidderau to Opelika (Alabama) | 4,697.63 mi (7,560.10 km) |
| Nidderau to Opelousas (Louisiana) | 5,071.89 mi (8,162.42 km) |
| Nidderau to Orange (California) | 5,781.89 mi (9,305.05 km) |
| Nidderau to Orange (Texas) | 5,158.20 mi (8,301.32 km) |
| Nidderau to Orange City (Florida) | 4,717.40 mi (7,591.92 km) |
| Nidderau to Orangeburg (South Carolina) | 4,474.36 mi (7,200.78 km) |
