| Grimsby to Oswego (Illinois) | 3,919.92 mi (6,308.50 km) |
| Grimsby to Oswego (New York) | 3,393.46 mi (5,461.25 km) |
| Grimsby to Otsego (Minnesota) | 3,933.15 mi (6,329.79 km) |
| Grimsby to Ottawa (Illinois) | 3,953.83 mi (6,363.07 km) |
| Grimsby to Ottawa (Kansas) | 4,326.09 mi (6,962.17 km) |
| Grimsby to Ottumwa (Iowa) | 4,100.84 mi (6,599.66 km) |
| Grimsby to Overland (Missouri) | 4,142.54 mi (6,666.77 km) |
| Grimsby to Overland Park (Kansas) | 4,290.56 mi (6,904.98 km) |
| Grimsby to Overlea (Maryland) | 3,581.29 mi (5,763.53 km) |
| Grimsby to Oviedo (Florida) | 4,297.51 mi (6,916.17 km) |
| Grimsby to Owasso (Oklahoma) | 4,466.64 mi (7,188.36 km) |
| Grimsby to Owatonna (Minnesota) | 3,977.25 mi (6,400.76 km) |
| Grimsby to Owensboro (Kentucky) | 4,067.83 mi (6,546.54 km) |
| Grimsby to Owings Mills (Maryland) | 3,589.81 mi (5,777.23 km) |
| Grimsby to Owosso (Michigan) | 3,703.79 mi (5,960.67 km) |
