| Kallithea to Oakley (California) | 6,746.27 mi (10,857.07 km) |
| Kallithea to Oakton (Virginia) | 5,140.40 mi (8,272.67 km) |
| Kallithea to Oakville (Missouri) | 5,698.27 mi (9,170.49 km) |
| Kallithea to Oatfield (Oregon) | 6,307.60 mi (10,151.11 km) |
| Kallithea to Ocala (Florida) | 5,775.03 mi (9,294.02 km) |
| Kallithea to Ocean Acres (New Jersey) | 4,974.79 mi (8,006.15 km) |
| Kallithea to Ocean City (New Jersey) | 5,007.63 mi (8,059.01 km) |
| Kallithea to Ocean Pines (Maryland) | 5,066.92 mi (8,154.43 km) |
| Kallithea to Ocean Pointe (Hawaii) | 8,340.47 mi (13,422.70 km) |
| Kallithea to Ocean Springs (Mississippi) | 6,015.73 mi (9,681.38 km) |
| Kallithea to Oceanside (California) | 6,917.74 mi (11,133.03 km) |
| Kallithea to Oceanside (New York) | 4,911.94 mi (7,905.00 km) |
| Kallithea to Ocoee (Florida) | 5,773.10 mi (9,290.91 km) |
| Kallithea to Oconomowoc (Wisconsin) | 5,410.40 mi (8,707.19 km) |
| Kallithea to Odenton (Maryland) | 5,106.84 mi (8,218.66 km) |
