| West Carson to Oerlinghausen | 5,699.59 mi (9,172.61 km) |
| West Carson to Oestrich-Winkel | 5,780.79 mi (9,303.29 km) |
| West Carson to Offenburg | 5,857.09 mi (9,426.08 km) |
| West Carson to Oftersheim | 5,830.58 mi (9,383.41 km) |
| West Carson to Ohrdruf | 5,817.45 mi (9,362.28 km) |
| West Carson to Ohringen | 5,866.76 mi (9,441.64 km) |
| West Carson to Olbernhau | 5,898.36 mi (9,492.49 km) |
| West Carson to Olching | 5,973.12 mi (9,612.81 km) |
| West Carson to Oldenburg | 5,626.60 mi (9,055.13 km) |
| West Carson to Oldenburg in Holstein | 5,639.20 mi (9,075.42 km) |
| West Carson to Olfen | 5,675.32 mi (9,133.55 km) |
| West Carson to Olpe | 5,724.02 mi (9,211.92 km) |
| West Carson to Olsberg | 5,725.95 mi (9,215.03 km) |
| West Carson to Oranienburg | 5,783.10 mi (9,307.00 km) |
| West Carson to Ortenberg | 5,793.76 mi (9,324.15 km) |
