| Middelkerke to Oswego (Illinois) | 4,105.66 mi (6,607.42 km) |
| Middelkerke to Oswego (New York) | 3,570.00 mi (5,745.36 km) |
| Middelkerke to Otsego (Minnesota) | 4,127.14 mi (6,641.99 km) |
| Middelkerke to Ottawa (Illinois) | 4,139.60 mi (6,662.04 km) |
| Middelkerke to Ottawa (Kansas) | 4,514.58 mi (7,265.52 km) |
| Middelkerke to Ottumwa (Iowa) | 4,289.44 mi (6,903.19 km) |
| Middelkerke to Overland (Missouri) | 4,326.45 mi (6,962.75 km) |
| Middelkerke to Overland Park (Kansas) | 4,478.83 mi (7,207.99 km) |
| Middelkerke to Overlea (Maryland) | 3,750.22 mi (6,035.40 km) |
| Middelkerke to Oviedo (Florida) | 4,453.90 mi (7,167.86 km) |
| Middelkerke to Owasso (Oklahoma) | 4,653.20 mi (7,488.60 km) |
| Middelkerke to Owatonna (Minnesota) | 4,169.80 mi (6,710.64 km) |
| Middelkerke to Owensboro (Kentucky) | 4,247.01 mi (6,834.91 km) |
| Middelkerke to Owings Mills (Maryland) | 3,759.18 mi (6,049.82 km) |
| Middelkerke to Owosso (Michigan) | 3,887.40 mi (6,256.17 km) |
