| Gary to Opwijk | 4,131.65 mi (6,649.26 km) |
| Gary to Ostend | 4,075.14 mi (6,558.31 km) |
| Gary to Oud-Heverlee | 4,154.49 mi (6,686.01 km) |
| Gary to Oud-Turnhout | 4,149.42 mi (6,677.85 km) |
| Gary to Oudenaarde | 4,113.67 mi (6,620.31 km) |
| Gary to Oudenburg | 4,079.62 mi (6,565.51 km) |
| Gary to Oupeye | 4,195.57 mi (6,752.11 km) |
| Gary to Overijse | 4,151.22 mi (6,680.74 km) |
| Gary to Overpelt | 4,169.07 mi (6,709.47 km) |
| Gary to Paal | 4,166.23 mi (6,704.91 km) |
| Gary to Peer | 4,173.41 mi (6,716.45 km) |
| Gary to Pepinster | 4,207.14 mi (6,770.74 km) |
| Gary to Peruwelz | 4,124.51 mi (6,637.76 km) |
| Gary to Perwez | 4,167.43 mi (6,706.82 km) |
| Gary to Philippeville | 4,172.34 mi (6,714.74 km) |
