| Fos-sur-Mer to Olympia Heights (Florida) | 4,793.11 mi (7,713.76 km) |
| Fos-sur-Mer to Omaha (Nebraska) | 4,804.93 mi (7,732.78 km) |
| Fos-sur-Mer to On Top of the World Designated Place (Florida) | 4,738.42 mi (7,625.76 km) |
| Fos-sur-Mer to Onalaska (Wisconsin) | 4,499.23 mi (7,240.82 km) |
| Fos-sur-Mer to Oneida (New York) | 3,883.09 mi (6,249.22 km) |
| Fos-sur-Mer to Oneonta (New York) | 3,878.88 mi (6,242.46 km) |
| Fos-sur-Mer to Ontario (California) | 5,975.41 mi (9,616.49 km) |
| Fos-sur-Mer to Ontario (Oregon) | 5,413.11 mi (8,711.55 km) |
| Fos-sur-Mer to Opa-locka (Florida) | 4,781.39 mi (7,694.90 km) |
| Fos-sur-Mer to Opelika (Alabama) | 4,727.56 mi (7,608.27 km) |
| Fos-sur-Mer to Opelousas (Louisiana) | 5,124.36 mi (8,246.86 km) |
| Fos-sur-Mer to Orange (California) | 5,995.83 mi (9,649.36 km) |
| Fos-sur-Mer to Orange (Texas) | 5,217.52 mi (8,396.79 km) |
| Fos-sur-Mer to Orange City (Florida) | 4,698.76 mi (7,561.92 km) |
| Fos-sur-Mer to Orangeburg (South Carolina) | 4,486.07 mi (7,219.63 km) |
