| DeKalb to Orbetello | 4,777.60 mi (7,688.81 km) |
| DeKalb to Oria | 5,117.82 mi (8,236.34 km) |
| DeKalb to Oristano | 4,778.37 mi (7,690.04 km) |
| DeKalb to Orta Nova | 5,004.64 mi (8,054.18 km) |
| DeKalb to Orte | 4,823.42 mi (7,762.55 km) |
| DeKalb to Ortona | 4,907.58 mi (7,897.99 km) |
| DeKalb to Orvieto | 4,801.32 mi (7,726.97 km) |
| DeKalb to Orzinuovi | 4,602.43 mi (7,406.89 km) |
| DeKalb to Osimo | 4,821.92 mi (7,760.14 km) |
| DeKalb to Ospitaletto | 4,601.44 mi (7,405.30 km) |
| DeKalb to Ostuni | 5,105.08 mi (8,215.83 km) |
| DeKalb to Ottaviano | 4,977.55 mi (8,010.59 km) |
| DeKalb to Ovada | 4,583.23 mi (7,376.00 km) |
| DeKalb to Ozieri | 4,766.72 mi (7,671.29 km) |
| DeKalb to Paceco | 5,027.21 mi (8,090.52 km) |
