| Siedlce to Oberkirch | 672.59 mi (1,082.42 km) |
| Siedlce to Obernburg am Main | 592.12 mi (952.92 km) |
| Siedlce to Obernkirchen | 556.11 mi (894.97 km) |
| Siedlce to Oberschleissheim | 544.42 mi (876.16 km) |
| Siedlce to Oberstdorf | 626.63 mi (1,008.46 km) |
| Siedlce to Obertraubling | 494.91 mi (796.49 km) |
| Siedlce to Obertshausen | 599.65 mi (965.04 km) |
| Siedlce to Oberursel | 607.39 mi (977.50 km) |
| Siedlce to Ochsenfurt | 558.61 mi (899.00 km) |
| Siedlce to Ochsenhausen | 613.75 mi (987.73 km) |
| Siedlce to Ochtrup | 637.71 mi (1,026.30 km) |
| Siedlce to Odenthal | 653.87 mi (1,052.31 km) |
| Siedlce to Oelde | 600.20 mi (965.92 km) |
| Siedlce to Oelsnitz | 452.59 mi (728.37 km) |
| Siedlce to Oer-Erkenschwick | 640.19 mi (1,030.29 km) |
