| Smiltene to Orbetello | 1,218.89 mi (1,961.62 km) |
| Smiltene to Oria | 1,226.46 mi (1,973.80 km) |
| Smiltene to Oristano | 1,436.60 mi (2,311.98 km) |
| Smiltene to Orta Nova | 1,200.20 mi (1,931.53 km) |
| Smiltene to Orte | 1,191.42 mi (1,917.40 km) |
| Smiltene to Ortona | 1,157.44 mi (1,862.72 km) |
| Smiltene to Orvieto | 1,181.37 mi (1,901.23 km) |
| Smiltene to Orzinuovi | 1,073.68 mi (1,727.92 km) |
| Smiltene to Osimo | 1,103.92 mi (1,776.59 km) |
| Smiltene to Ospitaletto | 1,060.99 mi (1,707.50 km) |
| Smiltene to Ostuni | 1,211.55 mi (1,949.80 km) |
| Smiltene to Ottaviano | 1,252.81 mi (2,016.20 km) |
| Smiltene to Ovada | 1,152.28 mi (1,854.41 km) |
| Smiltene to Ozieri | 1,384.93 mi (2,228.83 km) |
| Smiltene to Paceco | 1,474.12 mi (2,372.37 km) |
