| Smiltene to Opwijk | 978.99 mi (1,575.53 km) |
| Smiltene to Ostend | 1,013.86 mi (1,631.65 km) |
| Smiltene to Oud-Heverlee | 967.34 mi (1,556.79 km) |
| Smiltene to Oud-Turnhout | 936.71 mi (1,507.49 km) |
| Smiltene to Oudenaarde | 1,004.36 mi (1,616.36 km) |
| Smiltene to Oudenburg | 1,012.61 mi (1,629.65 km) |
| Smiltene to Oupeye | 938.40 mi (1,510.21 km) |
| Smiltene to Overijse | 974.08 mi (1,567.63 km) |
| Smiltene to Overpelt | 925.40 mi (1,489.29 km) |
| Smiltene to Paal | 941.16 mi (1,514.64 km) |
| Smiltene to Peer | 927.49 mi (1,492.66 km) |
| Smiltene to Pepinster | 938.38 mi (1,510.18 km) |
| Smiltene to Peruwelz | 1,018.50 mi (1,639.11 km) |
| Smiltene to Perwez | 970.78 mi (1,562.32 km) |
| Smiltene to Philippeville | 997.92 mi (1,606.00 km) |
