| Smiltene to Oerlinghausen | 781.79 mi (1,258.18 km) |
| Smiltene to Oestrich-Winkel | 889.77 mi (1,431.94 km) |
| Smiltene to Offenburg | 966.01 mi (1,554.64 km) |
| Smiltene to Oftersheim | 900.66 mi (1,449.48 km) |
| Smiltene to Ohrdruf | 762.27 mi (1,226.76 km) |
| Smiltene to Ohringen | 880.21 mi (1,416.56 km) |
| Smiltene to Olbernhau | 689.72 mi (1,110.00 km) |
| Smiltene to Olching | 878.39 mi (1,413.63 km) |
| Smiltene to Oldenburg | 753.53 mi (1,212.69 km) |
| Smiltene to Oldenburg in Holstein | 619.56 mi (997.08 km) |
| Smiltene to Olfen | 836.43 mi (1,346.10 km) |
| Smiltene to Olpe | 849.95 mi (1,367.87 km) |
| Smiltene to Olsberg | 813.59 mi (1,309.35 km) |
| Smiltene to Oranienburg | 594.55 mi (956.84 km) |
| Smiltene to Ortenberg | 838.64 mi (1,349.65 km) |
