| Nidda to Olympia Heights (Florida) | 4,840.72 mi (7,790.39 km) |
| Nidda to Omaha (Nebraska) | 4,659.11 mi (7,498.12 km) |
| Nidda to On Top of the World Designated Place (Florida) | 4,750.86 mi (7,645.77 km) |
| Nidda to Onalaska (Wisconsin) | 4,358.16 mi (7,013.79 km) |
| Nidda to Oneida (New York) | 3,819.46 mi (6,146.83 km) |
| Nidda to Oneonta (New York) | 3,823.51 mi (6,153.34 km) |
| Nidda to Ontario (California) | 5,756.45 mi (9,264.12 km) |
| Nidda to Ontario (Oregon) | 5,151.04 mi (8,289.79 km) |
| Nidda to Opa-locka (Florida) | 4,828.27 mi (7,770.35 km) |
| Nidda to Opelika (Alabama) | 4,697.22 mi (7,559.44 km) |
| Nidda to Opelousas (Louisiana) | 5,070.85 mi (8,160.74 km) |
| Nidda to Orange (California) | 5,776.76 mi (9,296.79 km) |
| Nidda to Orange (Texas) | 5,156.97 mi (8,299.34 km) |
| Nidda to Orange City (Florida) | 4,718.16 mi (7,593.15 km) |
| Nidda to Orangeburg (South Carolina) | 4,474.44 mi (7,200.92 km) |
