| Sluis to Oakley (California) | 5,432.13 mi (8,742.17 km) |
| Sluis to Oakton (Virginia) | 3,823.39 mi (6,153.14 km) |
| Sluis to Oakville (Missouri) | 4,354.24 mi (7,007.47 km) |
| Sluis to Oatfield (Oregon) | 5,020.28 mi (8,079.36 km) |
| Sluis to Ocala (Florida) | 4,489.43 mi (7,225.03 km) |
| Sluis to Ocean Acres (New Jersey) | 3,662.54 mi (5,894.29 km) |
| Sluis to Ocean City (New Jersey) | 3,696.84 mi (5,949.49 km) |
| Sluis to Ocean Pines (Maryland) | 3,758.98 mi (6,049.49 km) |
| Sluis to Ocean Pointe (Hawaii) | 7,293.67 mi (11,738.03 km) |
| Sluis to Ocean Springs (Mississippi) | 4,698.24 mi (7,561.08 km) |
| Sluis to Oceanside (California) | 5,579.34 mi (8,979.09 km) |
| Sluis to Oceanside (New York) | 3,597.08 mi (5,788.94 km) |
| Sluis to Ocoee (Florida) | 4,493.76 mi (7,232.01 km) |
| Sluis to Oconomowoc (Wisconsin) | 4,061.31 mi (6,536.05 km) |
| Sluis to Odenton (Maryland) | 3,790.77 mi (6,100.65 km) |
