| Olecko to Oberkirch | 727.76 mi (1,171.22 km) |
| Olecko to Obernburg am Main | 637.18 mi (1,025.45 km) |
| Olecko to Obernkirchen | 566.87 mi (912.29 km) |
| Olecko to Oberschleissheim | 618.72 mi (995.73 km) |
| Olecko to Oberstdorf | 702.00 mi (1,129.76 km) |
| Olecko to Obertraubling | 564.85 mi (909.04 km) |
| Olecko to Obertshausen | 640.73 mi (1,031.16 km) |
| Olecko to Oberursel | 645.84 mi (1,039.37 km) |
| Olecko to Ochsenfurt | 609.87 mi (981.49 km) |
| Olecko to Ochsenhausen | 681.63 mi (1,096.98 km) |
| Olecko to Ochtrup | 645.92 mi (1,039.51 km) |
| Olecko to Odenthal | 677.37 mi (1,090.12 km) |
| Olecko to Oelde | 615.45 mi (990.48 km) |
| Olecko to Oelsnitz | 503.00 mi (809.50 km) |
| Olecko to Oer-Erkenschwick | 656.12 mi (1,055.92 km) |
