| Middelharnis to Oswego (Illinois) | 4,136.35 mi (6,656.82 km) |
| Middelharnis to Oswego (New York) | 3,606.44 mi (5,804.00 km) |
| Middelharnis to Otsego (Minnesota) | 4,151.02 mi (6,680.41 km) |
| Middelharnis to Ottawa (Illinois) | 4,170.27 mi (6,711.41 km) |
| Middelharnis to Ottawa (Kansas) | 4,543.25 mi (7,311.65 km) |
| Middelharnis to Ottumwa (Iowa) | 4,318.01 mi (6,949.16 km) |
| Middelharnis to Overland (Missouri) | 4,358.43 mi (7,014.22 km) |
| Middelharnis to Overland Park (Kansas) | 4,507.66 mi (7,254.38 km) |
| Middelharnis to Overlea (Maryland) | 3,790.64 mi (6,100.45 km) |
| Middelharnis to Oviedo (Florida) | 4,499.90 mi (7,241.88 km) |
| Middelharnis to Owasso (Oklahoma) | 4,683.34 mi (7,537.10 km) |
| Middelharnis to Owatonna (Minnesota) | 4,195.03 mi (6,751.25 km) |
| Middelharnis to Owensboro (Kentucky) | 4,282.00 mi (6,891.21 km) |
| Middelharnis to Owings Mills (Maryland) | 3,799.39 mi (6,114.52 km) |
| Middelharnis to Owosso (Michigan) | 3,919.55 mi (6,307.90 km) |
