| Fountain Valley to Opwijk | 5,612.51 mi (9,032.46 km) |
| Fountain Valley to Ostend | 5,560.66 mi (8,949.01 km) |
| Fountain Valley to Oud-Heverlee | 5,633.96 mi (9,066.98 km) |
| Fountain Valley to Oud-Turnhout | 5,620.07 mi (9,044.63 km) |
| Fountain Valley to Oudenaarde | 5,599.97 mi (9,012.28 km) |
| Fountain Valley to Oudenburg | 5,565.21 mi (8,956.34 km) |
| Fountain Valley to Oupeye | 5,670.13 mi (9,125.19 km) |
| Fountain Valley to Overijse | 5,632.27 mi (9,064.26 km) |
| Fountain Valley to Overpelt | 5,638.17 mi (9,073.76 km) |
| Fountain Valley to Paal | 5,639.45 mi (9,075.82 km) |
| Fountain Valley to Peer | 5,643.42 mi (9,082.21 km) |
| Fountain Valley to Pepinster | 5,682.44 mi (9,145.01 km) |
| Fountain Valley to Peruwelz | 5,615.48 mi (9,037.25 km) |
| Fountain Valley to Perwez | 5,648.76 mi (9,090.80 km) |
| Fountain Valley to Philippeville | 5,661.21 mi (9,110.83 km) |
