| Grammichele to Oswego (Illinois) | 5,141.53 mi (8,274.50 km) |
| Grammichele to Oswego (New York) | 4,569.94 mi (7,354.61 km) |
| Grammichele to Otsego (Minnesota) | 5,201.52 mi (8,371.04 km) |
| Grammichele to Ottawa (Illinois) | 5,175.34 mi (8,328.91 km) |
| Grammichele to Ottawa (Kansas) | 5,560.30 mi (8,948.44 km) |
| Grammichele to Ottumwa (Iowa) | 5,337.37 mi (8,589.67 km) |
| Grammichele to Overland (Missouri) | 5,351.66 mi (8,612.66 km) |
| Grammichele to Overland Park (Kansas) | 5,523.77 mi (8,889.65 km) |
| Grammichele to Overlea (Maryland) | 4,712.90 mi (7,584.67 km) |
| Grammichele to Oviedo (Florida) | 5,343.76 mi (8,599.94 km) |
| Grammichele to Owasso (Oklahoma) | 5,688.39 mi (9,154.58 km) |
| Grammichele to Owatonna (Minnesota) | 5,237.18 mi (8,428.43 km) |
| Grammichele to Owensboro (Kentucky) | 5,250.45 mi (8,449.79 km) |
| Grammichele to Owings Mills (Maryland) | 4,723.74 mi (7,602.13 km) |
| Grammichele to Owosso (Michigan) | 4,915.51 mi (7,910.75 km) |
