| Marche-en-Famenne to Olympia Heights (Florida) | 4,687.92 mi (7,544.48 km) |
| Marche-en-Famenne to Omaha (Nebraska) | 4,537.94 mi (7,303.12 km) |
| Marche-en-Famenne to On Top of the World Designated Place (Florida) | 4,602.17 mi (7,406.47 km) |
| Marche-en-Famenne to Onalaska (Wisconsin) | 4,235.46 mi (6,816.32 km) |
| Marche-en-Famenne to Oneida (New York) | 3,680.81 mi (5,923.69 km) |
| Marche-en-Famenne to Oneonta (New York) | 3,683.48 mi (5,927.99 km) |
| Marche-en-Famenne to Ontario (California) | 5,655.00 mi (9,100.84 km) |
| Marche-en-Famenne to Ontario (Oregon) | 5,061.24 mi (8,145.28 km) |
| Marche-en-Famenne to Opa-locka (Florida) | 4,675.54 mi (7,524.55 km) |
| Marche-en-Famenne to Opelika (Alabama) | 4,554.49 mi (7,329.75 km) |
| Marche-en-Famenne to Opelousas (Louisiana) | 4,932.32 mi (7,937.80 km) |
| Marche-en-Famenne to Orange (California) | 5,675.37 mi (9,133.62 km) |
| Marche-en-Famenne to Orange (Texas) | 5,019.75 mi (8,078.50 km) |
| Marche-en-Famenne to Orange City (Florida) | 4,568.55 mi (7,352.37 km) |
| Marche-en-Famenne to Orangeburg (South Carolina) | 4,328.68 mi (6,966.33 km) |
