| West Carrollton to Oerlinghausen | 4,242.54 mi (6,827.71 km) |
| West Carrollton to Oestrich-Winkel | 4,283.41 mi (6,893.48 km) |
| West Carrollton to Offenburg | 4,333.35 mi (6,973.85 km) |
| West Carrollton to Oftersheim | 4,327.67 mi (6,964.71 km) |
| West Carrollton to Ohrdruf | 4,358.92 mi (7,015.00 km) |
| West Carrollton to Ohringen | 4,369.22 mi (7,031.58 km) |
| West Carrollton to Olbernhau | 4,461.66 mi (7,180.35 km) |
| West Carrollton to Olching | 4,475.93 mi (7,203.31 km) |
| West Carrollton to Oldenburg | 4,187.06 mi (6,738.42 km) |
| West Carrollton to Oldenburg in Holstein | 4,244.61 mi (6,831.04 km) |
| West Carrollton to Olfen | 4,202.67 mi (6,763.55 km) |
| West Carrollton to Olpe | 4,242.82 mi (6,828.16 km) |
| West Carrollton to Olsberg | 4,256.31 mi (6,849.87 km) |
| West Carrollton to Oranienburg | 4,381.95 mi (7,052.07 km) |
| West Carrollton to Ortenberg | 4,311.83 mi (6,939.22 km) |
