| Nea Smyrni to Oswego (Illinois) | 5,470.33 mi (8,803.65 km) |
| Nea Smyrni to Oswego (New York) | 4,923.06 mi (7,922.89 km) |
| Nea Smyrni to Otsego (Minnesota) | 5,493.86 mi (8,841.51 km) |
| Nea Smyrni to Ottawa (Illinois) | 5,504.29 mi (8,858.29 km) |
| Nea Smyrni to Ottawa (Kansas) | 5,881.19 mi (9,464.86 km) |
| Nea Smyrni to Ottumwa (Iowa) | 5,656.16 mi (9,102.71 km) |
| Nea Smyrni to Overland (Missouri) | 5,689.04 mi (9,155.63 km) |
| Nea Smyrni to Overland Park (Kansas) | 5,845.32 mi (9,407.13 km) |
| Nea Smyrni to Overlea (Maryland) | 5,087.80 mi (8,188.02 km) |
| Nea Smyrni to Oviedo (Florida) | 5,754.32 mi (9,260.68 km) |
| Nea Smyrni to Owasso (Oklahoma) | 6,018.34 mi (9,685.58 km) |
| Nea Smyrni to Owatonna (Minnesota) | 5,537.16 mi (8,911.19 km) |
| Nea Smyrni to Owensboro (Kentucky) | 5,602.98 mi (9,017.13 km) |
| Nea Smyrni to Owings Mills (Maryland) | 5,097.69 mi (8,203.94 km) |
| Nea Smyrni to Owosso (Michigan) | 5,250.05 mi (8,449.13 km) |
