| Costa Mesa to Opwijk | 5,613.88 mi (9,034.66 km) |
| Costa Mesa to Ostend | 5,562.00 mi (8,951.18 km) |
| Costa Mesa to Oud-Heverlee | 5,635.34 mi (9,069.20 km) |
| Costa Mesa to Oud-Turnhout | 5,621.48 mi (9,046.89 km) |
| Costa Mesa to Oudenaarde | 5,601.32 mi (9,014.45 km) |
| Costa Mesa to Oudenburg | 5,566.56 mi (8,958.51 km) |
| Costa Mesa to Oupeye | 5,671.53 mi (9,127.44 km) |
| Costa Mesa to Overijse | 5,633.64 mi (9,066.47 km) |
| Costa Mesa to Overpelt | 5,639.59 mi (9,076.04 km) |
| Costa Mesa to Paal | 5,640.85 mi (9,078.08 km) |
| Costa Mesa to Peer | 5,644.83 mi (9,084.48 km) |
| Costa Mesa to Pepinster | 5,683.84 mi (9,147.26 km) |
| Costa Mesa to Peruwelz | 5,616.82 mi (9,039.40 km) |
| Costa Mesa to Perwez | 5,650.14 mi (9,093.02 km) |
| Costa Mesa to Philippeville | 5,662.56 mi (9,113.00 km) |
