| Diekirch to Olympia Heights (Florida) | 4,729.31 mi (7,611.09 km) |
| Diekirch to Omaha (Nebraska) | 4,581.65 mi (7,373.45 km) |
| Diekirch to On Top of the World Designated Place (Florida) | 4,644.42 mi (7,474.48 km) |
| Diekirch to Onalaska (Wisconsin) | 4,279.19 mi (6,886.69 km) |
| Diekirch to Oneida (New York) | 3,724.22 mi (5,993.56 km) |
| Diekirch to Oneonta (New York) | 3,726.80 mi (5,997.71 km) |
| Diekirch to Ontario (California) | 5,697.76 mi (9,169.66 km) |
| Diekirch to Ontario (Oregon) | 5,102.98 mi (8,212.45 km) |
| Diekirch to Opa-locka (Florida) | 4,716.94 mi (7,591.19 km) |
| Diekirch to Opelika (Alabama) | 4,597.55 mi (7,399.05 km) |
| Diekirch to Opelousas (Louisiana) | 4,975.72 mi (8,007.64 km) |
| Diekirch to Orange (California) | 5,718.12 mi (9,202.43 km) |
| Diekirch to Orange (Texas) | 5,063.22 mi (8,148.47 km) |
| Diekirch to Orange City (Florida) | 4,610.64 mi (7,420.11 km) |
| Diekirch to Orangeburg (South Carolina) | 4,371.39 mi (7,035.07 km) |
