| Grenada to Oswego (Illinois) | 551.86 mi (888.13 km) |
| Grenada to Oswego (New York) | 978.99 mi (1,575.53 km) |
| Grenada to Otsego (Minnesota) | 818.77 mi (1,317.68 km) |
| Grenada to Ottawa (Illinois) | 526.08 mi (846.64 km) |
| Grenada to Ottawa (Kansas) | 450.59 mi (725.15 km) |
| Grenada to Ottumwa (Iowa) | 520.07 mi (836.96 km) |
| Grenada to Overland (Missouri) | 341.00 mi (548.79 km) |
| Grenada to Overland Park (Kansas) | 444.84 mi (715.90 km) |
| Grenada to Overlea (Maryland) | 831.29 mi (1,337.83 km) |
| Grenada to Oviedo (Florida) | 620.16 mi (998.05 km) |
| Grenada to Owasso (Oklahoma) | 381.87 mi (614.55 km) |
| Grenada to Owatonna (Minnesota) | 735.45 mi (1,183.59 km) |
| Grenada to Owensboro (Kentucky) | 313.50 mi (504.52 km) |
| Grenada to Owings Mills (Maryland) | 819.25 mi (1,318.45 km) |
| Grenada to Owosso (Michigan) | 705.60 mi (1,135.55 km) |
