| Wolf Trap to Oerlinghausen | 4,012.27 mi (6,457.13 km) |
| Wolf Trap to Oestrich-Winkel | 4,041.66 mi (6,504.43 km) |
| Wolf Trap to Offenburg | 4,083.72 mi (6,572.12 km) |
| Wolf Trap to Oftersheim | 4,083.71 mi (6,572.09 km) |
| Wolf Trap to Ohrdruf | 4,126.15 mi (6,640.40 km) |
| Wolf Trap to Ohringen | 4,126.00 mi (6,640.15 km) |
| Wolf Trap to Olbernhau | 4,232.76 mi (6,811.96 km) |
| Wolf Trap to Olching | 4,231.06 mi (6,809.23 km) |
| Wolf Trap to Oldenburg | 3,962.48 mi (6,377.00 km) |
| Wolf Trap to Oldenburg in Holstein | 4,030.76 mi (6,486.88 km) |
| Wolf Trap to Olfen | 3,968.97 mi (6,387.43 km) |
| Wolf Trap to Olpe | 4,006.11 mi (6,447.21 km) |
| Wolf Trap to Olsberg | 4,022.44 mi (6,473.49 km) |
| Wolf Trap to Oranienburg | 4,163.70 mi (6,700.83 km) |
| Wolf Trap to Ortenberg | 4,073.72 mi (6,556.02 km) |
