| Grimes to Oswego (Illinois) | 281.58 mi (453.16 km) |
| Grimes to Oswego (New York) | 886.92 mi (1,427.36 km) |
| Grimes to Otsego (Minnesota) | 248.07 mi (399.23 km) |
| Grimes to Ottawa (Illinois) | 257.97 mi (415.17 km) |
| Grimes to Ottawa (Kansas) | 226.39 mi (364.34 km) |
| Grimes to Ottumwa (Iowa) | 84.64 mi (136.21 km) |
| Grimes to Overland (Missouri) | 274.05 mi (441.03 km) |
| Grimes to Overland Park (Kansas) | 198.48 mi (319.43 km) |
| Grimes to Overlea (Maryland) | 919.78 mi (1,480.25 km) |
| Grimes to Oviedo (Florida) | 1,144.64 mi (1,842.12 km) |
| Grimes to Owasso (Oklahoma) | 388.11 mi (624.61 km) |
| Grimes to Owatonna (Minnesota) | 169.16 mi (272.24 km) |
| Grimes to Owensboro (Kentucky) | 446.22 mi (718.11 km) |
| Grimes to Owings Mills (Maryland) | 904.82 mi (1,456.17 km) |
| Grimes to Owosso (Michigan) | 499.33 mi (803.60 km) |
