| Smiltene to Oberkirch | 957.95 mi (1,541.67 km) |
| Smiltene to Obernburg am Main | 860.17 mi (1,384.31 km) |
| Smiltene to Obernkirchen | 754.22 mi (1,213.79 km) |
| Smiltene to Oberschleissheim | 868.60 mi (1,397.87 km) |
| Smiltene to Oberstdorf | 951.04 mi (1,530.56 km) |
| Smiltene to Obertraubling | 812.79 mi (1,308.06 km) |
| Smiltene to Obertshausen | 859.36 mi (1,383.01 km) |
| Smiltene to Oberursel | 861.38 mi (1,386.25 km) |
| Smiltene to Ochsenfurt | 840.15 mi (1,352.09 km) |
| Smiltene to Ochsenhausen | 924.88 mi (1,488.45 km) |
| Smiltene to Ochtrup | 824.14 mi (1,326.32 km) |
| Smiltene to Odenthal | 873.78 mi (1,406.21 km) |
| Smiltene to Oelde | 805.07 mi (1,295.63 km) |
| Smiltene to Oelsnitz | 737.33 mi (1,186.61 km) |
| Smiltene to Oer-Erkenschwick | 844.04 mi (1,358.34 km) |
