| Oakton to Oerlinghausen | 4,015.37 mi (6,462.11 km) |
| Oakton to Oestrich-Winkel | 4,044.68 mi (6,509.29 km) |
| Oakton to Offenburg | 4,086.68 mi (6,576.88 km) |
| Oakton to Oftersheim | 4,086.71 mi (6,576.92 km) |
| Oakton to Ohrdruf | 4,129.23 mi (6,645.36 km) |
| Oakton to Ohringen | 4,129.01 mi (6,644.99 km) |
| Oakton to Olbernhau | 4,235.86 mi (6,816.95 km) |
| Oakton to Olching | 4,234.05 mi (6,814.05 km) |
| Oakton to Oldenburg | 3,965.62 mi (6,382.05 km) |
| Oakton to Oldenburg in Holstein | 4,033.96 mi (6,492.03 km) |
| Oakton to Olfen | 3,972.04 mi (6,392.39 km) |
| Oakton to Olpe | 4,009.17 mi (6,452.13 km) |
| Oakton to Olsberg | 4,025.51 mi (6,478.44 km) |
| Oakton to Oranienburg | 4,166.87 mi (6,705.93 km) |
| Oakton to Ortenberg | 4,076.76 mi (6,560.92 km) |
