| Nafplio to Oswego (Illinois) | 5,453.64 mi (8,776.78 km) |
| Nafplio to Oswego (New York) | 4,902.52 mi (7,889.84 km) |
| Nafplio to Otsego (Minnesota) | 5,482.26 mi (8,822.84 km) |
| Nafplio to Ottawa (Illinois) | 5,487.59 mi (8,831.42 km) |
| Nafplio to Ottawa (Kansas) | 5,865.86 mi (9,440.19 km) |
| Nafplio to Ottumwa (Iowa) | 5,641.00 mi (9,078.31 km) |
| Nafplio to Overland (Missouri) | 5,671.24 mi (9,126.97 km) |
| Nafplio to Overland Park (Kansas) | 5,829.88 mi (9,382.28 km) |
| Nafplio to Overlea (Maryland) | 5,064.08 mi (8,149.84 km) |
| Nafplio to Oviedo (Florida) | 5,725.14 mi (9,213.73 km) |
| Nafplio to Owasso (Oklahoma) | 6,001.79 mi (9,658.94 km) |
| Nafplio to Owatonna (Minnesota) | 5,524.54 mi (8,890.89 km) |
| Nafplio to Owensboro (Kentucky) | 5,582.91 mi (8,984.82 km) |
| Nafplio to Owings Mills (Maryland) | 5,074.12 mi (8,166.00 km) |
| Nafplio to Owosso (Michigan) | 5,232.40 mi (8,420.74 km) |
