| Grammichele to Odessa (Texas) | 6,168.47 mi (9,927.19 km) |
| Grammichele to Ogden (Utah) | 6,054.25 mi (9,743.37 km) |
| Grammichele to Oildale (California) | 6,604.78 mi (10,629.37 km) |
| Grammichele to Ojus (Florida) | 5,401.73 mi (8,693.24 km) |
| Grammichele to Okemos (Michigan) | 4,936.66 mi (7,944.78 km) |
| Grammichele to Oklahoma City (Oklahoma) | 5,796.43 mi (9,328.46 km) |
| Grammichele to Okmulgee (Oklahoma) | 5,726.50 mi (9,215.90 km) |
| Grammichele to Olathe (Kansas) | 5,529.39 mi (8,898.70 km) |
| Grammichele to Old Jamestown (Missouri) | 5,342.01 mi (8,597.14 km) |
| Grammichele to Oldsmar (Florida) | 5,441.34 mi (8,756.99 km) |
| Grammichele to Olean (New York) | 4,702.23 mi (7,567.52 km) |
| Grammichele to Olive Branch (Mississippi) | 5,488.49 mi (8,832.88 km) |
| Grammichele to Olivehurst (California) | 6,475.40 mi (10,421.16 km) |
| Grammichele to Olney (Maryland) | 4,746.04 mi (7,638.02 km) |
| Grammichele to Olympia (Washington) | 6,050.91 mi (9,737.99 km) |
