| Geldern to Olympia Heights (Florida) | 4,708.09 mi (7,576.94 km) |
| Geldern to Omaha (Nebraska) | 4,520.11 mi (7,274.41 km) |
| Geldern to On Top of the World Designated Place (Florida) | 4,615.68 mi (7,428.21 km) |
| Geldern to Onalaska (Wisconsin) | 4,219.03 mi (6,789.87 km) |
| Geldern to Oneida (New York) | 3,681.07 mi (5,924.12 km) |
| Geldern to Oneonta (New York) | 3,685.40 mi (5,931.08 km) |
| Geldern to Ontario (California) | 5,621.07 mi (9,046.24 km) |
| Geldern to Ontario (Oregon) | 5,019.02 mi (8,077.33 km) |
| Geldern to Opa-locka (Florida) | 4,695.59 mi (7,556.82 km) |
| Geldern to Opelika (Alabama) | 4,559.71 mi (7,338.15 km) |
| Geldern to Opelousas (Louisiana) | 4,932.35 mi (7,937.85 km) |
| Geldern to Orange (California) | 5,641.40 mi (9,078.95 km) |
| Geldern to Orange (Texas) | 5,018.26 mi (8,076.10 km) |
| Geldern to Orange City (Florida) | 4,583.47 mi (7,376.39 km) |
| Geldern to Orangeburg (South Carolina) | 4,337.98 mi (6,981.31 km) |
