| DeKalb to Oerlinghausen | 4,294.01 mi (6,910.54 km) |
| DeKalb to Oestrich-Winkel | 4,345.23 mi (6,992.97 km) |
| DeKalb to Offenburg | 4,402.29 mi (7,084.81 km) |
| DeKalb to Oftersheim | 4,391.29 mi (7,067.10 km) |
| DeKalb to Ohrdruf | 4,411.92 mi (7,100.29 km) |
| DeKalb to Ohringen | 4,431.89 mi (7,132.44 km) |
| DeKalb to Olbernhau | 4,510.46 mi (7,258.89 km) |
| DeKalb to Olching | 4,539.50 mi (7,305.61 km) |
| DeKalb to Oldenburg | 4,233.71 mi (6,813.50 km) |
| DeKalb to Oldenburg in Holstein | 4,281.26 mi (6,890.02 km) |
| DeKalb to Olfen | 4,257.56 mi (6,851.88 km) |
| DeKalb to Olpe | 4,300.22 mi (6,920.54 km) |
| DeKalb to Olsberg | 4,310.99 mi (6,937.87 km) |
| DeKalb to Oranienburg | 4,421.61 mi (7,115.90 km) |
| DeKalb to Ortenberg | 4,370.08 mi (7,032.97 km) |
