| Nierstein to Olympia Heights (Florida) | 4,822.84 mi (7,761.61 km) |
| Nierstein to Omaha (Nebraska) | 4,658.85 mi (7,497.69 km) |
| Nierstein to On Top of the World Designated Place (Florida) | 4,735.98 mi (7,621.83 km) |
| Nierstein to Onalaska (Wisconsin) | 4,357.19 mi (7,012.21 km) |
| Nierstein to Oneida (New York) | 3,810.62 mi (6,132.60 km) |
| Nierstein to Oneonta (New York) | 3,813.91 mi (6,137.89 km) |
| Nierstein to Ontario (California) | 5,764.24 mi (9,276.64 km) |
| Nierstein to Ontario (Oregon) | 5,162.88 mi (8,308.86 km) |
| Nierstein to Opa-locka (Florida) | 4,810.44 mi (7,741.66 km) |
| Nierstein to Opelika (Alabama) | 4,686.12 mi (7,541.59 km) |
| Nierstein to Opelousas (Louisiana) | 5,062.16 mi (8,146.77 km) |
| Nierstein to Orange (California) | 5,784.57 mi (9,309.36 km) |
| Nierstein to Orange (Texas) | 5,149.00 mi (8,286.51 km) |
| Nierstein to Orange City (Florida) | 4,702.65 mi (7,568.18 km) |
| Nierstein to Orangeburg (South Carolina) | 4,461.48 mi (7,180.05 km) |
