| Guardiagrele to Oswego (Illinois) | 4,901.94 mi (7,888.90 km) |
| Guardiagrele to Oswego (New York) | 4,347.33 mi (6,996.35 km) |
| Guardiagrele to Otsego (Minnesota) | 4,939.47 mi (7,949.31 km) |
| Guardiagrele to Ottawa (Illinois) | 4,935.88 mi (7,943.53 km) |
| Guardiagrele to Ottawa (Kansas) | 5,315.93 mi (8,555.17 km) |
| Guardiagrele to Ottumwa (Iowa) | 5,091.41 mi (8,193.84 km) |
| Guardiagrele to Overland (Missouri) | 5,118.17 mi (8,236.90 km) |
| Guardiagrele to Overland Park (Kansas) | 5,279.79 mi (8,497.00 km) |
| Guardiagrele to Overlea (Maryland) | 4,508.17 mi (7,255.20 km) |
| Guardiagrele to Oviedo (Florida) | 5,173.37 mi (8,325.73 km) |
| Guardiagrele to Owasso (Oklahoma) | 5,450.12 mi (8,771.12 km) |
| Guardiagrele to Owatonna (Minnesota) | 4,979.58 mi (8,013.85 km) |
| Guardiagrele to Owensboro (Kentucky) | 5,027.93 mi (8,091.67 km) |
| Guardiagrele to Owings Mills (Maryland) | 4,518.20 mi (7,271.33 km) |
| Guardiagrele to Owosso (Michigan) | 4,679.61 mi (7,531.11 km) |
