| Mardin to Octeville | 2,252.96 mi (3,625.78 km) |
| Mardin to Oignies | 2,058.37 mi (3,312.63 km) |
| Mardin to Oissel | 2,128.75 mi (3,425.89 km) |
| Mardin to Olivet | 2,079.72 mi (3,346.98 km) |
| Mardin to Ollioules | 1,869.68 mi (3,008.97 km) |
| Mardin to Olonne-sur-Mer | 2,246.33 mi (3,615.11 km) |
| Mardin to Oloron-Sainte-Marie | 2,194.60 mi (3,531.87 km) |
| Mardin to Onet Village | 2,032.78 mi (3,271.44 km) |
| Mardin to Onnaing | 2,031.18 mi (3,268.86 km) |
| Mardin to Orange | 1,922.83 mi (3,094.50 km) |
| Mardin to Orchies | 2,047.66 mi (3,295.38 km) |
| Mardin to Orleans | 2,079.61 mi (3,346.82 km) |
| Mardin to Orly | 2,064.69 mi (3,322.79 km) |
| Mardin to Ormesson-sur-Marne | 2,058.53 mi (3,312.89 km) |
| Mardin to Orsay | 2,073.53 mi (3,337.02 km) |
