| Siirt to Oberkirch | 1,836.53 mi (2,955.60 km) |
| Siirt to Obernburg am Main | 1,809.64 mi (2,912.33 km) |
| Siirt to Obernkirchen | 1,859.09 mi (2,991.91 km) |
| Siirt to Oberschleissheim | 1,676.23 mi (2,697.62 km) |
| Siirt to Oberstdorf | 1,722.23 mi (2,771.67 km) |
| Siirt to Obertraubling | 1,662.51 mi (2,675.55 km) |
| Siirt to Obertshausen | 1,826.83 mi (2,940.00 km) |
| Siirt to Oberursel | 1,840.19 mi (2,961.50 km) |
| Siirt to Ochsenfurt | 1,766.35 mi (2,842.66 km) |
| Siirt to Ochsenhausen | 1,746.24 mi (2,810.31 km) |
| Siirt to Ochtrup | 1,935.39 mi (3,114.71 km) |
| Siirt to Odenthal | 1,916.57 mi (3,084.42 km) |
| Siirt to Oelde | 1,888.85 mi (3,039.82 km) |
| Siirt to Oelsnitz | 1,692.86 mi (2,724.40 km) |
| Siirt to Oer-Erkenschwick | 1,922.00 mi (3,093.16 km) |
