| Herstal to Oswego (Illinois) | 4,229.24 mi (6,806.30 km) |
| Herstal to Oswego (New York) | 3,696.00 mi (5,948.14 km) |
| Herstal to Otsego (Minnesota) | 4,246.68 mi (6,834.37 km) |
| Herstal to Ottawa (Illinois) | 4,263.17 mi (6,860.91 km) |
| Herstal to Ottawa (Kansas) | 4,637.10 mi (7,462.69 km) |
| Herstal to Ottumwa (Iowa) | 4,411.89 mi (7,100.25 km) |
| Herstal to Overland (Missouri) | 4,450.67 mi (7,162.66 km) |
| Herstal to Overland Park (Kansas) | 4,601.44 mi (7,405.30 km) |
| Herstal to Overlea (Maryland) | 3,877.33 mi (6,239.96 km) |
| Herstal to Oviedo (Florida) | 4,581.57 mi (7,373.32 km) |
| Herstal to Owasso (Oklahoma) | 4,776.51 mi (7,687.06 km) |
| Herstal to Owatonna (Minnesota) | 4,290.23 mi (6,904.47 km) |
| Herstal to Owensboro (Kentucky) | 4,372.51 mi (7,036.88 km) |
| Herstal to Owings Mills (Maryland) | 3,886.24 mi (6,254.30 km) |
| Herstal to Owosso (Michigan) | 4,011.68 mi (6,456.17 km) |
