| Efkarpia to Oswego (Illinois) | 5,308.19 mi (8,542.71 km) |
| Efkarpia to Oswego (New York) | 4,769.29 mi (7,675.42 km) |
| Efkarpia to Otsego (Minnesota) | 5,322.62 mi (8,565.92 km) |
| Efkarpia to Ottawa (Illinois) | 5,342.13 mi (8,597.33 km) |
| Efkarpia to Ottawa (Kansas) | 5,716.24 mi (9,199.39 km) |
| Efkarpia to Ottumwa (Iowa) | 5,491.02 mi (8,836.94 km) |
| Efkarpia to Overland (Missouri) | 5,528.99 mi (8,898.04 km) |
| Efkarpia to Overland Park (Kansas) | 5,680.60 mi (9,142.04 km) |
| Efkarpia to Overlea (Maryland) | 4,941.38 mi (7,952.38 km) |
| Efkarpia to Oviedo (Florida) | 5,621.93 mi (9,047.63 km) |
| Efkarpia to Owasso (Oklahoma) | 5,855.61 mi (9,423.70 km) |
| Efkarpia to Owatonna (Minnesota) | 5,367.58 mi (8,638.28 km) |
| Efkarpia to Owensboro (Kentucky) | 5,447.74 mi (8,767.30 km) |
| Efkarpia to Owings Mills (Maryland) | 4,950.89 mi (7,967.69 km) |
| Efkarpia to Owosso (Michigan) | 5,089.92 mi (8,191.44 km) |
