| Oskaloosa to Oerlinghausen | 4,463.11 mi (7,182.68 km) |
| Oskaloosa to Oestrich-Winkel | 4,518.46 mi (7,271.76 km) |
| Oskaloosa to Offenburg | 4,578.22 mi (7,367.94 km) |
| Oskaloosa to Oftersheim | 4,565.16 mi (7,346.92 km) |
| Oskaloosa to Ohrdruf | 4,581.44 mi (7,373.11 km) |
| Oskaloosa to Ohringen | 4,605.31 mi (7,411.54 km) |
| Oskaloosa to Olbernhau | 4,678.04 mi (7,528.58 km) |
| Oskaloosa to Olching | 4,713.10 mi (7,585.00 km) |
| Oskaloosa to Oldenburg | 4,400.90 mi (7,082.57 km) |
| Oskaloosa to Oldenburg in Holstein | 4,444.00 mi (7,151.92 km) |
| Oskaloosa to Olfen | 4,428.14 mi (7,126.41 km) |
| Oskaloosa to Olpe | 4,471.75 mi (7,196.59 km) |
| Oskaloosa to Olsberg | 4,481.39 mi (7,212.11 km) |
| Oskaloosa to Oranienburg | 4,585.40 mi (7,379.49 km) |
| Oskaloosa to Ortenberg | 4,541.84 mi (7,309.38 km) |
